Freehand of a Freehand

So today I google searched images of hands because they are so painfully hard for me to draw. I found another blogger who has been inactive for some time that actually had a sketch of a hand - and it looks like he also used a tablet to draw it - so I thought I would try to make my own copy of what he did. It unfortunately did not turn out so well for me (I'm the one on the right).

I started with the joints - kind of mapping out where the joints of the fingers should go with little lines and proceeded to draw the hand base and then fingers.

A whole lot of erasing and scribbles later I had something resembling the palm and fingers of a hand with no thumb. But oh the thumb - why is it so hard for me to get the shape of that right? I never really did - so I just left it at my best attempt.