I remembered my student Hailey, who would sketch her right hand (she's a lefty) over and over in class, whenever she'd have a minute. What a great exercise. You don't have to travel far sometimes. Just look at your hand. Draw it. Fail. Repeat. Here was my first attempt tonight -- too dark, too stiff:
That doesn't mean I was happy with my second attempt (the large one, above), but it was getting late.
Bic pen on Xerox paper.