Foreshortening is an absolute must if you are going to draw comic book characters AND their hands! I think hands are just as important as the eyes as far as expressiveness and communication. This is the third video in my hand series and it explains the concept of foreshortening and how to use it in drawing.
I have several different series on my YouTube channel to help with drawing and, of course, one of them is hands. Hands are very important to drawing because they are so expressive. You can really add to the body language of your character using the hands. Regrettably, they are also one of the most difficult body parts to draw. How does anyone get better at anything? Repetition.
In this video I demonstrate penciling, inking, and coloring the hand in two different positions while holding a pencil. So go get your sketchbook and follow along. A little practice goes a long way!