For self-study, or study in general, I am kind of surprised how many people don't implement what they learned after they study. In school I learned Java, compu

For self-study, or study in general, I am kind of surprised how many people don't implement what they learned after they study. In school I learned Java, computer graphics, ML/AI and other things, and during or after school I implemented all of these things in personal projects I wanted. I don't know what my understanding or retention of Java would be without having had to use it to write a program doing something I wanted to do.