Quite an awesome signature to be fair dude, I can see most of the techniques you have used and the render works well with them.
I would say work a lot on the text as although the signature is good, it really really does make it look a thousand times worst.
You said you were new - did you follow a tutorial? seen quite a few with the same effect, bloody awesome tutorials though and do actually take quite a lot of effort to follow.
Summary : Good job, work on text.