Not bad at all bud. I would have to agree that the font should be a but smaller on the nav bar to give it a more sleek and clean look rather than it kinda giving out that hey look at me feel ya know. Do u plan to do the coding portion of this as well or just the gfx portion ?
Considering that you're a beginner, and you are trying to improve I would say it looks great. Now I'm not being a photoshop expert or anything either, but it's a great start for sure!