Lmk what's good and bad so I know where to work on.

it's decent though far too blurry
also try adding more effects / color adjustments on top of the ender
tuts will help lots but this is a good start

The background is too sharp for such a blurry render and there doesn't seem to be any blending (looks like the render pasted onto a background). I'm more inclined to look at the giant red design in the background than the barbarian.

Read some tuts, they'll teach you a lot of effects & how to use them. Remember to think about the steps as you're doing them - Don't just zombie your way through it or you gain nothing other than the single outcome.