For someone like me who has almost no basic Spring knowledge, even the step of improving from v2->v3 feels like a huge wall.. I'm a new job seeker and I'm in a hurry to get employed, so as an urgent specification, I'm following Younghan's roadmap: Java Beginner-Basic-Intermediate Part 1 Exception Handling, then Spring Introduction-Basic-HTTP-and currently I'm listening to MVC Part 1 v3. Object-oriented programming, polymorphism, and exception handling were manageable and I enjoyed listening to them, but Spring is really not easy. The DI concept in the basic part was really confusing, so that part alone took me about a month averaging 8 hours a day, and I've been listening to v3 for 3 days now. (My existing Java base knowledge was only about loops and conditional statements) Even the knowledge I understood after spending that month, when I try to write code myself and create a portfolio project, I have to watch the lectures again, and I'm afraid of how many days or months it might take. The curriculum ahead will likely get more difficult rather than easier, and I heard that Younghan's lectures are considered easy in Korea, and I saw in interviews that he tries to explain things simply. While others following the same roadmap take a few months to create portfolios, I'm afraid it might take me several years. I wonder if I need to refer to other materials besides these lectures, and how I should look for them - I'm at a loss. Even when I try to ask questions on Inflearn, my mind is confused about what I don't know and what I should ask. When I'm stuck like this, is it right to listen 10 or 20 times repeatedly until I understand? Or is it right to move on even if I don't understand?