you need alot of work,....ok...check out tutorials, but don't copy them exactly add in bits, this sig im honestly gonna say is awful [im honest and sorry for being rude or mean] you need alot of inprovement, the background is just really uh,, horrible, the render doesn't seem to fit what you put in it, gradiant maps may have helped, using filters, and ajustment layers would of made this a little better, so try to use them next time
Keep Trying!