In my personal styles of drawing, in hands I draw the two types of hands you've drawn on the right, for the boxy hands, I tend to add more of a curve to the fingers(ex: in a waving hand, make the fingers drift outwards). For hair, I don't do stringy hair, I give it a bunch of volume to it. I don't really draw feet because it's way too hard for me. I'm not the best artist. I dunno if these will hel