I've used that stock before Are you sure this is your first try? It's really good for a first go-round. On the criticism side, you've got a lot of dead space off to the left, and your text placement leaves something to be desired. Try messing around with the text, different sizes, effects, and placement. You want it to be closer to your focal point. Other than that, there's not much more I can say without moving into deeper more complicated things, and that's not really applicable because of your neophyte status. Tl;dr: Good job guy, work on dead space and text.
Yeah its my first try lol, I've just been around GIMP a lot and i know all the tools and stuff. Thanks for the constructive cnc though, it helps a lot