I thought you played well for someone who has just recently started playing. And a Sicillian - at that!! Most beginners are at a loss facing the positional demands of a Sicillian.
Your opponent's mistake which led to the loss of the knight was a consequence of early bad moves which lost tempo: 6...Ne5. I was not enamoured by his 8....Qc7 (self pin) I think its bad habit waiting to be punished.
I started playing chess about 3-4 months ago after discovering this site, when I first joined here I was an absolute beginner and my rating was about 800 (on a good day) Now I think I am a solid 1200 player and I think this is my best, or at least most tactical game that I have played so far.
http://www.chess.com/livechess/game.html?id=11385268
The game goes fairly well for both sides and I manage to get one pawn up, after he blunders away a biship with no compensation he resigns, but I think that he could have pulled together and beaten me as I admit he was a superior player (likely he played with a little less fight due to my being rated over 100pts below him)
But I think it was a good game played and definitly some good tactical training for me.
Any comments or advice would be much appreciated, thanks in advance :D