Well it looks like you pretty well crushed your opponent. Usually when someone wants help it is more of ..."at which point did I lose this game". I should preface by saying that I am only a moderately strong player myself. I think that there are numerous places where you or you opponent could have played better, but that is part of the learning process, and on the plus side you also recognized several good double attacks and capitalized on them. In a general sense, I feel that you relied too heavily on you queen for much of the game. The queen is a powerful piece with its ability to move almost effortly about the board, but this is also its greatest weakness...it is so powerful a piece that you can rarely exchange it for anything other than another queen without compromising your ability to win the game. Because of this your opponent was able to parry most of your queen moves and counter attack your queen at the same time. Developing more of your pieces and coordinating the attack of your queen with the other pieces will strengthen your game.
By move 23 your opponent was probably already lost unless you performed a gross blunder, but 23...Nb4 offered up a piece. Your opponent declined to exchange queens, when he would have netted a knight in the process which may have not won him the game but would have vastly improved his game at the time. Did you realize this as you moved toward an endgame?
Also in the Sicilian, 2Nf3 usually leads to the closed sicilian, with white pawns on e4, d3 and c2 and black pawns on e7, d6 and c5. I'm no expert on the sicilian but an early ...e6 in a closed sicilian tends to be anti-positional and this is probably why you didn't find any references for it.
Well, here’s my first on-line Chess.com game. Please scrutinize it. Since it was the first game for both players, I have no idea where my rating will end up after a few more games with others on this site. If you would be so kind, please let me know what I missed, how many blunders I made and escaped, poor tactics and strategy I was party to, and maybe even a brilliant move or two. LOL. Maybe even some of the more experienced players will find some entertainment in it.
Thanks in advance for you help!