I stronglyy think that u started with a hard render. By any means, I am not putting you down, but you need to go a tad simpler, just to get the feeling.
1. The BG , u chose, is good, but on the right side of your work, where u have god knows what, is not ok.
2. Some colors, which are used, are not even in the picture at all. ( blue, purple, cyan,red)
3. The render ( the asian dude) is drawn in a hard style, the fx, which u put, do not blend very well.
4. I understand what are you trying to do, but u need to practice a little more. My truthful advice, is to go a tad simpler, just to get your hands dirty.
Please post more samples of your progress and we can advise u some more.
p.s. Please don't take this CnC as discouraging one!!
with respect,
max.