@tillianisafox no dw its super overwhelming! Cosmic says something about this in her videos as well. Some people learn each muscle, for me a lot of it is observation and experience. I've looked at a lot of people and I know by now that this bop is in this place.
Also I think interest matters a lot, so if there is something you would like to draw, don't force yourself to do something else if it kills your motivation.
I like drawing pretty girls, so I learned most anatomy drawing pretty girls lol