I'm only using ChatGPT; is this the right way to do it?

How to master the essentials of 15+ AI tools in just 20 days

★★★★★ | 1,000+ Community Members | 57 Course Reviews

Are you by any chance having these concerns?

There are so many AI tools that I don't know which one to use first.

ChatGPT, Claude, Gemini, Copilot, Genspark, Nano Banana, Gamma, MiriCanvas, NotebookLM... Amidst the flood of AI tools, it's overwhelming to know which ones to use and where to even begin.

I followed along with YouTube videos, but nothing stuck.

Information picked up in bits and pieces from here and there. No system, no order, and a cycle of forgetting everything after a few days. Even after taking a lecture, the memory of what was learned is hazy, and it feels like there is nothing that can actually be applied to real-world tasks.

Are you just repeating 'do this for me' over and over?

"Summarize this," "Translate this," "Organize this" — if you are only giving AI simple errands, you aren't even utilizing 10% of its potential yet. Most people don't realize that simply changing a single prompt can completely transform the quality of the output.

This gap is widening.

Your colleague in the next seat is already working with AI.

While you are wondering, 'Where should I start with AI?', the colleague sitting next to you is already using AI to write reports, create images, edit videos, and even code.

If you wander on your own

• Wandering through YouTube and blogs for 3 months

• Barely getting used to just ChatGPT alone

• Trial and error while translating English materials

• The cycle of forgetting everything after just listening to lectures

• Ending up right back where you started

If you learn systematically

• Master 15+ AI tools in just 4 weeks

• Covers all areas from prompts and images to video and coding

• Internalize it by doing it yourself through assignments.

• Review anytime with the Notion guide

• Up to portfolio deployment

AI is not a choice, but a matter of survival. If you are 3 months late, it will take a year to catch up. Now is the fastest timing.

From prompts to vibe coding, it only takes 20 days

4-Week Completion AI Beginner-Intermediate Course + Challenge

From ChatGPT, Claude, to Gemini — 15+ AI Tools All-in-One

ChatGPT, Claude, Gemini, Genspark, MiriCanvas, Capcut, NotebookLM, Napkin AI, Gamma, Skywork, Veo3, AI Studio, Claude Code... From prompting to images, video, and coding, finish it all at once without needing to learn them separately.

This is not a lecture where you just listen.

A challenge-based approach where you complete weekly assignments for 4 weeks and verify them within the community. You won't be saying, "I took the class but didn't gain anything," after this course.

Instructor Introduction

Seulgi Kang - Marketing · Data · AI Strategy Consultant

Key Experience

• 2025-2026 Tableau Ambassador

• Former) Data Strategy Leader at Focus Media

• Former) Innocean KIA Global Digital Media Planner

Project Experience

• KIA Digital Media Planning

• Launched F.act, Focus Media Korea's marketing full-funnel performance measurement system

• Integrated digital channel and campaign management for McDonald's Global Office

Education & Community

• Operating a community of 2,000+ members (Marketing Data Connect, AI After Work)

• Numerous lectures on AI & Data Literacy & Tableau

20 days later, you will be transformed like this

WEEK 1 — Strengthening AI Fundamentals

From ChatGPT prompting to building GPTs

From the proper way to write prompts to web search, Deep Research, Canvas, and GPTs. We will build a solid foundation for using Artificial Intelligence (AI) "properly."

🎯 Outcome: Creating your own GPTs

WEEK 2 — AI Image Creation Master

From posters to infographics, create them in a snap with AI

Create posters, infographics, and product detail page images with AI. I'll also share the secret to preventing Korean fonts from breaking.

🎯 Outcome: Creating infographics for practical business use

WEEK 3 — PPT & Video Production

From comparing 7 AI PPT tools to video editing

Compare 7 PPT AI tools at a glance and take on the challenge of AI video production and editing. We are now in an era where AI even creates videos for you.

🎯 Outcome: Video content created with AI

WEEK 4 — Vibe Coding & Automation

Utilizing AI Agents — An era where you can create services without knowing how to code

You don't need to know how to code. By using the AI Agent method and giving verbal instructions to the AI, a service is created. You will even go as far as deploying your own portfolio site yourself.

🎯 Outcome: Deploying my own portfolio site

4 weeks, 20 days—this is how you will learn

WEEK 1 | Building AI Fundamentals

ChatGPT Prompt · Deep Research · GPTs Completion

• Day 1 — Let's use prompts properly / The 4 elements of a good prompt

• Day 2 — Web Search vs. Deep Research / How to use real-time information search and in-depth reports

• Day 3 — Writing & Coding with ChatGPT Canvas / Writing long documents, implementing simple html

• Day 4 — Creating a Data Analysis Dashboard with Canvas / Converting Excel Data into a Dashboard

• Day 5 — Creating GPTs, My Own Way / Creating Your Own Custom AI Assistant

WEEK 2 | AI Image Creation Master

Nano Banana · NotebookLM · Napkin AI · MiriCanvas

• Day 6 — Generating Images with Nano Banana / Posters, Infographics, and Product Detail Page Images

• Day 7 — Creating charts/infographics without broken Korean text / Nano Banana Pro vs NotebookLM vs Napkin AI

• Day 8 — Improving Image Quality through Prompting / 9 Elements including Subject, Background, and Mood

• Day 9 — Editing Images with MiriCanvas / Post-processing and Editing Generated Images

• Day 10 — SNS Channel Planning Framework / Prompts to Set Content Strategy in One Go

WEEK 3 | PPT & Video Production

Practical application of Gamma · Genspark · Veo3 · Capcut

• Day 11 — Comparison of 7 PPT AI Tools / Gamma, Genspark, Skywork, MiriCanvas, NotebookLM, Manus, Claude

• Day 12 — 4 Proven Methods for Creating AI PPTs / From Single-Line Generation to Structured Approaches

• Day 13 — How to Create High-Quality PPTs / Key Techniques for Improving AI PPT Quality

• Day 14 — Making AI Videos / Utilizing Genspark, Miricle, and Veo3 combinations

• Day 15 — Editing Videos with Capcut / Practical Post-Editing for AI Videos

WEEK 4 | Vibe Coding & Automation

Claude Code · AI Studio · Google Opal Practical Deployment

• Day 16 — Creating a 'Project' that Provides Context / Utilizing ChatGPT/Claude Project Features

• Day 17 — Vibe Coding Concepts and Tool Comparison / An Era Where Even Non-Coders Can Create Services

• Day 18 — Creating a Free Service with AI Studio / From Deployment and Authentication to DB and Storage

• Day 19 — Creating and Deploying a Portfolio Site / Google Antigravity + GitHub Deployment

• Day 20 — Claude Code Vibe Coding + Automation / Claude Code in Practice + Google Opal Automation

Benefits included in the tuition fee

Lecture Videos · Guides · Challenges · Community

• 📹 4-hour lecture video — Lifetime access, repeat learning at your convenience

• 📝 Notion Study Guide — Reference materials with detailed screenshots and explanations

• 📋 4-Week Challenge Assignments — Internalize the material by completing and verifying weekly assignments

• 👥 AI After Work Community — Grow together with 1,000+ colleagues

Students prove it themselves

★★★★★ Actual Student Reviews

"I feel like it has truly become mine"

"I was able to figure out which of the various AI tools I actually needed. I liked the introduction to the different tools. Since the assignments followed the flow of the actual class, it was especially great for reinforcing what I learned!!"

"It really resonated with me because you also showed actual use cases."

"When I took offline classes, the progress was slow and I only learned how to make simple reviews, images, or videos with AI. However, this class moved along quickly, so I learned a lot, and it really resonated with me because Seulgi-nim showed actual use cases."

"The ways I use AI have become more diverse, and my efficiency has improved."

"I feel like it has truly become mine. Thanks to the class, the ways I use AI have become more diverse and my efficiency has improved."

"The fact that I could become familiar with it by doing it myself was also a great advantage"

"The four-week course was by no means easy, but I believe it was a class that sufficiently helped me take my planned level of AI utilization to the next level. A major advantage was that assignments were given every week, allowing me to not just listen but to become familiar with the material by doing it myself."

"It was my first time trying Vibe Coding, and it was so much fun."

"I thought it would only cover very basic things since it was an AI basics course, but I was so grateful because you tried to teach us so many things in depth!!! I had only been thinking about Vibe Coding, but trying it for the first time through this was so much fun."

"There are many things that I actually applied and used in my work right away"

"There were many things I could actually apply to my work immediately, so it was a great time to build a solid foundation in AI!"

"So that even humanities majors and beginners can easily follow along"

"Provided a Notion guide full of useful tips so that even liberal arts majors and beginners could easily follow along. Rather than being limited to specific tasks, the instructor shared tips applicable to various situations, which was both useful in many ways and enjoyable."

"Everything was perfect"

"Everything was perfect. I wish there was more."

Frequently Asked Questions

Course Difficulty and Learning Methods

I don't know anything about coding; can I still follow along with Vibe Coding?

Yes, don't worry. Among our students, those from liberal arts backgrounds and those with absolutely no coding experience have followed along well. The Notion guide provides step-by-step explanations along with screenshots, so you can follow along at your own pace. If there's anything you don't understand, you can ask questions immediately in the community.

I don't think I'll be able to finish it all within 4 weeks because I don't have enough time.

The videos are yours to keep forever, so you can proceed at your own pace. The total course length is 4 hours, so you can complete it in four 1-hour sessions. The challenge assignments are also based on voluntary certification, so you can participate without any pressure.

What makes this lecture different

Isn't it enough to just be good at using ChatGPT?

Each AI tool has different strengths. Nanobanana is better for image generation, Genspark for PPTs, Veo3 for video, and Claude Code for coding. Knowing the optimal use for 15 different tools allows you to produce much better results in the same amount of time.

How is this different from other AI courses?

Most AI courses focus on only one or two tools or are centered around theory. This course is an all-in-one program that covers the entire spectrum—from prompting with ChatGPT, Claude, and Gemini to images, video, and Vibe Coding—all in 20 days. Furthermore, because there are weekly assignments, the level of practical internalization is completely different from courses where you just listen.

Tuition fee

Is it worth 100,000 won?

If you were to take separate courses for prompting, images, video, and coding, it would cost at least 200,000 KRW. We have packaged all of this, including a 4-week challenge system and a Notion guide, for just 100,000 KRW.

If you start now, your level of AI utilization will be completely different in four weeks.

All-in-one 100,000 KRW

If you learn prompts + images + videos + Vibe Coding separately, it costs over 200,000 won

Master AI in 20 days for just 5,000 won a day

Included Benefits

• ✅ 4-hour lecture video (Lifetime access)

• ✅ Notion learning material guide (detailed capture + explanation)

• ✅ 4-week challenge assignments (Assignment completion & certification)

• ✅ Access to the After-Work AI Community (1,000+)