Umm... I think its a good idea and a good start...
A tree instead of a brick wall would have been cooler - and I think you need a model with DARK long hair and the makeup should either be lighter or much darker.
I see lonnggg black hair with dark sharp eye makeup... and something different with the leaves...against a tree with really cool bark.
Just my thoughts - cool idea tho..
Edit - and no necklace - and the inclusion of an apple or something would be kinda neat... maybe an apple orchard with the other trees in the background - kinda blurred..