What a cute little peanut. I agree with bringing her arms back to her a bit. Can't see a huge bit from this picture. She is 9, she just started riding and, it is a snapshot, not a whole picture (video) so, I wouldn't say too much. Keep up the good work, I am sure she will be great.
Is the schooling show at the barn where she trains or off site? This is a great learning experience for her. I know there are those that hate seeing a little person on a bigger horse but I personally think she looks great on that horse. Hand position will of course help headset but again... 9 and starting out.