Perspective on Hands Tutorial

This is very good. It makes sense, it's clear, intuitive, simple, and easy to read and see. This shows the different angels for drawn hands and where things should be.

Now you can see how a thumb would look on a drawn hand, how it should look, and how to do it without the colors of skin and flesh. This also shows how to draw a hand at different angels when it's closed or open.

This is good for understanding how a hand is drawn and how it works. Based on how this drawing is done, it may even help you understand how to animate hands better.