C&C per req: It's a start, but IMO, you have a way to go. The main issue here is exposure. You've got a very bright background, which is almost nothing but blown highlights as a result of exposing for the subject's skin. You had a couple of options here: One would have been to use fill-flash to reduce the dynamic range and even out the exposure, the other would be to move the subject to take advantage of the natural light.
As well, I think this would have been better executed in a vertical composition (portrait) and with a different background. The tree behind her head makes her look rather Medusa-like.
Lastly, I would have her stand a little more straight (she appers to be leaning forward slightly) and looking more toward the camera. Having subjects look away is fine if the viewer can see why they're looking away.
Just my $00.02 worth - your mileage may vary.
~John