look over tuts all i can say needs lots of work all over just read tuts and learn some stuff u will only benefit from tuts
Yea, you will greatly benefit from tutorials, check out our tutorial section or just look for labeled psds and try around a bit in photoshop / gimp. Trying out new things is the most important!
You lack flow, depth, a good bg, lighting, and good effects. Basically, you're a beginner, and that's ok. You can read tutorials and get better. Just heck the tutorial section for freebies and check out resource sections too. They're mucho helpful.