Read books. They have a lot of good starter info in them. The Conscientious Marine Aquarist: Robert Fenner is a good one. I also picked up The New MArine Aquarium: Michael Paletta, Saltware Aquariums for Dunmmies, and an Idiots guide to Saltwater Aquariums. All are good starters.
Once you have a plan of action come back and start posting away. It's the best way to get info that you need....specific questions.
Good luck.