Not bad at all.
You could do a bit more blending on the render though.
The background is also a bit too generic. (it looks like it's just brushes. Maybe some blending there too.)
i don't use photoshop, so I can't really help. lol
But, I can tell you to check out tutorials (aka - tuts).
The pros love to share their techniques. ^^
You can just google - photoshop sig tut
Good luck! ^_^