You've got talent, Zettai! I can't find any anatomical misstakes in your picture - but then, it's hard to see since it's such a small shot. However, her head seems a bit big and her features somewhat too round for TRC Sakura (unless that is a drawing of her as a child); she looks more like her CCS self.
EDIT: Just noticed her elbows. That really is a pic of her as a kid, right?