I think this is pretty good, pleasing to look at which is the best start possible lol... the contrasting colours work very well with each other and i love the colour pallet you've opted with. candy/retro 70's sort of look. I'd say the same thing as the guys above me, not sure if its too bright or too wide an area for the lighting. If i were you i'd also put some text and work on the depth a little. (the overlapping effect works well for this so far.) not bad at all for someone whos rusty with photoshop.. hope ive helped