how do i improve on this?

[coolpup]

Hi! I kind of recently jumped right into digital after practicing a lot of traditional. The first thing I wanted to do after playing around using photoshop was to paint a body in a grayscale. I used a image from google and then took a big brush and meshed it all out by looking at it to get the likeness and all that. I noticed much later that the placement was a bit off and that the body turned out more masculine than expected which I will try to think of next time!!

I tried to push to get the likeness from my reference as much as I could but I still feel like there's A LOT to improve on..

My question is..

How do I go by to improve on this matter? and how are my values doing? :V


Link to painting:

http://imgur.com/vHM01Lj

Thanks!