Well, pretty good for a beginner, most certainly. Just two or three small nits: first off, the sleeve on the right hand edge of the picture: it seems a bit too overly bright, especially here, where it bleeds off into the TPF white, but still, about 1/3 EV too hot. Second, relating to the sleeve: as two have said, the crop at that edge of the sleve seems a bit less than ideal; to that, I think the above crop is better than the original framing of the shot. Third...her eyes look "worked" in software. maybe they are not, but this is a common technique people are being taught these days, to go in and ZAP! the eyes...personally, I don't like that.
I think overall though, it is a pleasant enough shot. Certainly much above the level of a great deal of beginner's work. her expression looks a little bit practiced, not super-relaxed, but at that age, many chldren put on a picture face whenever a camera comes out, and it's not an unpleasant expression by any means. If as a self-described beginner, if this is where you have started, you'll soon be cranking out fantastic work!