How to effectively learn photographic composition from movies?

Let's not talk about styles, colors and ideas. Consolidating the technical foundation is the first step. In any case, it is an insurmountable threshold and the foundation of the foundation. This is very important. Same old advice. Many novices are not worried. When I officially decided to learn PS eight years ago, I repeatedly compared more than 30 versions of a photo in order to hone the basic foundation, and I constantly realized that the effect brought by a little change was poor. So after I have a solid technology, I can use it flexibly.