23-Second Hands and Feet Warm-Up for Animation

Done as part of a practice session with poses of 23 seconds in length.

My current goal is: Improve my understanding of hand and foot bone structures.

Hello, and good evening, and this is my latest warm-up sketch for my animation of my tests. My real goal is to improve my understanding of my hand and foot bone structure, mostly for my animation. So, what do you think?