Not awful for a first sig, but there's definitely some stuff you could work on. First thing I noticed was the picture of Kruk... you should try and get pictures that aren't cut off on the sides because it looks a little off to see his arm cut off in the middle of the sig (nice jub cutting the picture out though, the edges look very clean for a first sig). A picture with his shoulders extending down would work alot better. The second thing is the text. To add effects, you could just right click on the layer and go to blending options. Some things you can put on are things like glow, strokes, and drop shadows... you could just play around with that stuff, it's pretty easy to learn how to do. The background is pretty simple. You can add effects to that with filter, either the default ones there or downloaded ones. I haven't downloaded any and stick to the defaults, but you can just play around with those also to see what you like (there's always the back button

). Here's a tutorial page for some things you can try out:
http://www.good-tutorials.com/track/4051. I'd probably start out with the "A-Blaze" tutorial for the background, and then work your way up to the metallic ones which are still pretty simple. Other than using tutorials and stuff to get better, the longer you keep making stuff you'll discover new things with Photoshop by yourself. Good luck.
