I'm pretty sure there is a thread on each boss in this forum.
Right now, you are just nervous. I was too. Trust your team. These are people you've been running with for a coulpe months now in all liklihood. They know what you can do, you know what they can do. Be on time, be prepared (food, pots, oils).
Be sure you have read up on the TRASH. There are mobs in the trash pulls which can wipe your raid. Give the Valets to a Druid or Warrior. Trust me. Call out to the raid when the Steward get you drunk. Watch out for the debuff the Waiters give.
Moroes is much more about CC than tanking. If you can bring two Priests for two shackles, that makes the fight easier. Also one priest works well if you have a Hunter who can chain trap (mine can't trap to save his life).
Have a plan for how you will deal with Garrotte. Dwarves FTW! You will need to BoP someone in your raid to clear it once. Be sure you don't eat a crush because of poor cooldown management working in a BoP.
Maiden. To tank or not to tank. If you are the only Paladin in your raid, I humbly submit to you that you are more helpful as a healer / cleanser than as a tank. BoSac the tank, and keep him up during the Repentance.
I have tanked her. It's a pain. I litterally spent the whole fight watching my buttons. Seeing a skill going on cooldown was the only way I knew I got it off.
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