The hand is a challenge to draw, model and sculpt (digitally). Earlier I decided to give it a try, starting with a sphere. I didn’t bother to finish it because it’s way too much work to manually move and reposition the fingers. I enjoy sculpting things manually, and for those that do, Blender really need a way to quickly bend / rotate the mesh—something like the Transpose tool in ZBrush.
Here’s my tip if you want to sculpt the hand: Let the palm face you (front view, “1” on the numpad). That way, you can use your left hand as a reference.