I took the course after seeing good reviews that said it was the best. At first, I was interested in the course because it was easy to understand, but As I went into the second half, functions, classes, etc., the course didn't explain the basic concepts and explained difficult words that weren't explained properly, so my overall understanding dropped and I lost interest, which made it difficult. I paid to take the course so that I wouldn't have to listen to the lectures, but I had to search on Google, look for other books, and understand on other YouTube channels while listening to the lectures. After learning the concepts well by looking for other YouTube channels and reading books, I understood it well. If you understand it, the explanations are good, but if you try to understand it as something you're hearing for the first time, it'll be difficult. The answer is that you shouldn't study only with this course. It seems that the best way to study is to study by looking at the Python Basics book together to understand the exact definitions of concepts and various rules, and to search YouTube for parts that you don't understand. Thank you.