A great job!! I know you said you're learning, might I suggest a little more contrast in colours or tones between the character and the background setting? They are both coloured well, but she doesn't seem to pop as much as she could.
Don't thank me too much for the shading, I just took the shading that you already had on there and brought it out a little with my personal touch. So really, the credit goes back to you. ^_^
The background, meh. I just tossed in a few greens and called it good. Sure, I could have put a tiny bit more detail into the bushes and stuff.... but really I made the background 'lain' so that she would stand out a little more. After all, she is what makes the deviation.