I'm withdrawing from the tournament, sorry for my noobishness, but based on the first games, I'm not ready yet. I can't seem to muster the morale for the next games, so I've decided not to continue.

Tournaments are the best preparation. Play even if you lose, ask your opponent for their password and review their saves, try replaying your moves and difficult battles; see how your opponent played and try to repeat their moves or find a better option.
And on my own example: in the last 2 tournaments, M-200, Winter Novice 2012-2013, Only_XL tournament, I didn't win a single game, not even a draw. Only yesterday did I get my first win, and it was a tough one... So don't give up. Unless you've decided not to play Heroes at all anymore, but that's a different story.

P.S. By withdrawing, you'll get a disqualification, and they might not let you participate again, or only in the last round.
Read my signature and keep playing. Good luck! ;)