This video demonstrates how to use a rubric to measure a successful drawing. It explains how to constructively look at your art instead of critically. For reflective practice, you can download the rubric:
This video demonstrates how to build the form of the hand from basic shapes.
This video explains a simple art hack you can use to add the fingers and thumb to the hand in proportion.
This video expands on the previous video explaining how to foreshorten the hand and fingers for more dynamic poses.