Awesome decision. We'll be here with you every step of the way.
What size do you want to get?
Whats your budget?
What do you want in it as far as livestock?
What kind of lighting do you have in mind?
Do you have friends to trade corals with?
What kind of corals do you like?
What are your plans as far as making water?
How automated do you want the tank to be?

Just some questions off the top of my head, lets figure out a roadmap for you and get right on it.