You need to work on your colors. Look at tutorials on here with to figure them out. That fractal is bugging me. You probably should have taken some of it off. There really aren't any effects on the render, which is ok, but it might look better with some various effects. The green on the outside seems out of place (mostly because the render has a lot of red in it, and since this isn't christmas, the green looks out of place with the rest of it). Mostly just work on applying some more effects to your sigs and practice with coloring. I'm glad to see you using something besides a c4d as a background

. Keep practicing and keep getting better

.
Edit: Forgot to say that the text looks slapped on and doesn't really blend (don't worry, text is a hard concept to grasp).