Like crow said, some black outlining would do wonders for the hair. On the opposite end, the dress could use some colored outlining. The shades on the hair are also really way too close to each other in terms of brightness and could probably do with some changing. The hat is also basically pillow shaded and could do with some changes.
That said for all the roast that just came from my keyboard its not that bad, especially not for a first attempt!