You might want to raise her arm up a bit. It is proportonally wrong right here. And try to bring the hat down a bit lower so that her head doesn't look so square at the top too. It looks good, keep at it.
Of course that is what we here at PaperDemon do!! And dont listen to your sister, we are all good, we just have to develop ourselves. Which is why I joined!! to develop!!
Just keep at it!!