Don't beat yourself up; we all started somewhere. Being here helps a lot in all honesty. For this sig, the effects are very grungy which I think fits the theme and the text nicely; I like that. Lighting could be a bit more contrasty to really bring out the raw power of the render. I also find the text being plain white makes it stand out too much. You never want the eye to go to text before the render (unless it's very intentional, this doesn't feel that way). The lighting I mentioned would help a lot with that. I also find, especially given the effects used, that this piece is a tad over-sharp. Not too bad but something to watch out for.