I think its pretty good for my first try in months. Although, I did forget all sorts of things. Please comment and or criticize. I need tips!
The text should stand out more and the background lacks depth. I think you did a good job on coloring though, the bg really matches the render. For text, try adding a black outer glow and a different, bigger, font.
Burn some sides to add flow and play with your curves its really bright. Also add some FG effects to add in some depth to it. Maybe a dark C4D. and make a clipping mask over the text. Its to hard to see.