well when I do hands I tend to break them into 3 big shapes 

starting with the wrist then palm, thumb then the fingers 

once I have the big shapes in I separate the fingers

here are some more examples of the different parts

one of the best ways that I learned how to draw hands was to draw a LOT of them, in different poses, while looking at a reference. 

This is a site that I found useful, 

it has 3D models of hands that you can change the view so you can see the same pose from different angles. 


p.s. this site i linked to does contain nude figures just a heads up