I watched the lecture well. I watched the whole thing, it was a very good lecture. It's the best for getting used to it with your eyes. I bought the book "Learn Spring Project with Code", and I found the site through a guide at that cafe. It's right to follow the book one by one, but it was boring, but after watching it in a video like this, I think I've reached a level where I can find it and do it. Thank you.