it's good a for a beginner but it needs some work. The signature is to messy. try to stick to one render per signature and try to smudge the main render and use filtering and effects. Maybe use some C4D Renders but check some tutorials first. C4D renders is a whole another story.. save it till you get more skilled.
Very good for a beginner. Try to stay away from the bevel and emboss on your text. I must agree as well that the green stroke on the text is kind of out of place.