Mmm i think the signature is too big... do it smalles and place it soomewhere else
& also those aspirals(if thats how you call them), and X look weird... the scan too, try to fix that///
also the background has a little error, related with t5he scan too, you havent work between the hair, its the same BG from where you got the scan...
i also think that the scan doesnt match the BG, but it is only my opinion...
hope this helps! good luck!*:)

Fix the hair, you need to clean the image (use pen tool), and I dont really like the bg, it doesnt really suit with the main image.

Good Luck~