There are many materials on YouTube for simply implementing each one, but this lecture contains a lot of content that is really necessary for practical work in a logical order. In particular, you can establish and think about the overall architecture, apply the MVVM pattern to separate each code and develop it for better maintenance, and it seems like it is hard to learn things like multilingualism, themes, and design systems properly anywhere. And useful tips keep coming up during the process. I highly recommend it to others. In fact, at first, I was pressed for time, so I tried to pick out only the content I needed (actually, all that is on YouTube..). If I did that, I might not know the true value of this lecture. I think it is important to understand this class logically in order and acquire the whole thing step by step. Then, I think I will suddenly see the forest and really level up as a developer.