its actually pretty good for a first sig.
the hand is WAYY too whited-out (lit up i guess...)
it took me like... five minutes of staring just to figure out what it was (what with my pervy mind and all...
the colors, bleh... they look washed out. add some interest. you've got a lot of highlights but not alot of lowlights, add some blacks, and some more saturated colors.
you kindof started this, but it looks more like an accident: you need to blend the background and the foreground. they look like 2 layers right now, give it some depth. i've got trouble with this too, so i'm just gonna say for some its easier, for others, the idea of a 3D image is harder.
you need to pick a point of focus, in this case its the face, but the hand really should be the point of focus, simply based on distance. because of the lighting, the face is the point of focus because its clear and sharp.
this render has a line of motion in it, it looks like energy is coming from the two things in his hands. use that line of energy to put flow between the two layers.

on the contrary to what it may seem like based on my criticisms, i like it. you've got the right idea going. keep experimenting with the lighting and colors, and blending (both of colors and of images/layers)
since its your first, i'm giving it a 9/10. you're on your way ^.^