The best way to start is to draw your non-dominant hand! Take a picture, or hold your hand in a pose while sketching it is a great way to start to familiarize yourself with how the hand is constructed. Basics has a few lessons on rhythms, and drawing hands as well. https://www.proko.com/course-lesson/thinking-in-3d https://www.proko.com/course-lesson/draw-any-pose-from-any-angle-rhythms Here are a few free lessons from the anatomy course on drawing hands! There's also a great e-book on drawing hands step by step that breaks down the basic construction. https://www.proko.com/tool/how-to-draw-hand-anatomy-ebook https://www.proko.com/course-lesson/how-to-draw-hands-muscle-anatomy-of-the-hand https://www.proko.com/course-lesson/how-to-draw-hands-details-for-realistic-hands https://www.proko.com/course-lesson/how-to-draw-hands-from-imagination-step-by-step https://www.proko.com/course-lesson/how-to-draw-cartoon-hands-comic-cartoon-and-mickey-mouse