The stock appears to be hard to see, and the way you brushed over it slightly isn't making matters any better. I appreciate you're trying, though. Read tutorials, go and stock up on your brushes. You should get better. EDIT: Question, are you using GIMP, Photoshop, or something else?
The white brush over the picture makes it hard to see, but I do like the background. If you could make the background darker, that would help make the picture stand out, and maybe take away the white brushover the picture.