I just read the original post again and realized I missed something. What type of psychology are you studing? I'm really interested in stuff like sociology or even anthropology. I've also bought a book about body language by some former CIA or FBI agent and read it all. It taught me a lot of how we function as social beings and stuff. You can also take a look at "neuromarketing". I know it sounds like it isn't related to this but I saw a talk about a guy that has been doing it for years and made millions in the market using different techniques and explaining how most of the ads worked. The one I saw was in Spanish but I'm sure there are people that uploaded similar stuff in English.
Sorry for the long ass post! lmao
I'm not sure what exact field of psychology I want to be working in but there are so many paths to choose from I am sure I will find what best suits me. Also that book you read about analyzing behavior, that is very cool. Analyzinga persons behavior is a key part ofpsychology(depending on the job). If you can really master it, it plays a big role in being able to read someone's behavior.