Just for now, I would advise practicing, like everyone else has been saying. Just so that you can get the hang of photoshop better, and there's a lot more to these tags and pieces that you may realize. You have to keep in mind blending, depth, lighting, and I'm not even really the person to be tell you all this, since I'm still (slowly) learning. But what you've got is definitely a start, so I'd suggest experimentation with techinques, incorporating other elements and resources, and reading some tutorials (which I believe was mentioned already.)
♠ Brother // Lusankya ♠ Theme Credit // Myself/Elektrisch ♠
Featuring // Bill Kaulitz of Tokio Hotel