Well it's not all that bad. At least you did something. Some people take a cool anime stock (or anything), put text over it, and say they made it. -.-
Anyways, you don't have to make your own brushes or anything. Try putting some c4ds. Search on google or Deviantart.com for some c4ds, and put them on lighten, liner dodge, color dodge, soft light (just experiment with blending options).
A little tip: Try downloading a splatter brush from deviantart.com (or search on google). Then make a new layer, brush over it. Hide that layer. Make a new layer, go to IMAGE -> APPLY IMAGE, and click ok (don't mess with any of the settings). Then unhide your previous layer. Then right-click on the applied image layer, and click "Use previous layer to make clipping-mask". Then try moving around that applied image layer, flipping it verticle, or something.
This process is known as a clipping mask. If you didn't get what I said, try searching it on google (or you can pm or add my msn and I can try to help you).
Your actually much better then you think. I hope to see more art from you

.
I hope this post helped you

.
Ugh your back =|
Well thats a nice way to treat a new artist..