That's really well done. What program did you make it with? If I may give a tip you could use the dodge and burn tool, which is implemented in most programs to easily blend the shades better together. (Like on the thighs) Or if you're working with photoshop you can use a feather layer.
I use Paint.SAI. I am still getting use to using the digital tablet as I only got it last December and hadn't been able to use it due to my lack of laptop till now. I practice everyday so I have been gradually getting better as I learn what I am best at.
