Echey, you have talent. This is really beautifully done. I love how the note is not in the center of the picture, and how the hand is there, but not in plain sight. I don't know if you thought about the composition, but it works out in any case! I really love it.
The indexfinger is a little unnatural though... it is a little to long, the anatomy is not quite right. But I don't blame you, anatomy is freakishly difficult.
And I feel the same, btw.