I got asked about how to draw poses, which is pretty hard to explain. I could have drawn a whole bunch of poses and said: Here, have a million poses of someone walking or sleeping or whatever.
But I think the thing that is important to wrap your head around when you're drawing a character is the way you express who they are through their poses.
Analyse your favorite cartoons or actors and see how they change themselves to become the character they are playing. You'll notice that certain stereotypes will come up again and again such as:
The introvert tucks themselves inward away from others
The millionaire lounges and gestures confidently
The thinker's forehead is thrust forward toward the source of interest
Spying on people in real life is also a good idea to get your head around how certain people act too.
So getting inside your character's head and working out how they hold themselves is super important. Because you can draw spot on anatomy and amazing detail but if you can't show personality you're work is going to look empty, like dolls wearing costumes as opposed to actual characters.
Hope that helps.