I really like the desaturated version compared to the color one. The tree sticks out even more in the colored version... and I don't really like the whole yellow striped sweater,green background, pink flower combo. The slightly desaturated look is nice.
Other than the things previously mentioned, I'm surprised no one mentioned her hair. I feel like you cropped it up too high, the end of her hair is cut off. I think the composition would be much stronger with more space towards the bottom.
Don't get me wrong, however, it's a nice start. Some things to thin about for next time. :thumbup: