While wandering about how to study Spring, I happened to find Kim Young-han's Spring introductory lecture on YouTube and started learning about roadmaps. It was a lecture that was really easy to understand and explained step by step, and I could feel his heart for the learner. I think the way he gradually applied the technology that was developing one by one and progressed through the lecture was a great help in understanding the whole thing. I started with the login part in MVC 2, and surprisingly, I saw how most of the previously used technologies worked, and I thought I was learning really well. Thank you for creating a good lecture and roadmap :) (You explained it to some extent in the roadmap explanation video) I'm currently listening to MVC 2, but I'm wondering whether I should listen to JPA Utilization 1 first after completing the lecture, or DB 1, which is next in this roadmap. If Young-han sees it himself, I would appreciate it if you could recommend one of the two!!