Hi, Congrats on your first setup. You will want to wait until your tank has cycled to start adding any livestock. You will also want to make sure your water parameters as far as calcium/alkalinity and magnesium levels are in balance if you want to keep any hard corals. And then add things slowly. Some of the easier to start with corals can be xenia, kenya tree, mushrooms, some zoanthids, montipora digitata. Explore this site. There is a lot of great info to help you learn what you need to. Its been a lot of help for me. I started my first tank a year and one month ago. I have three tanks now and they are all doing pretty good.
Oh, but anyway, is the lighting you have t-5 or compact fluorescent. It seems like you should be able to keep just about anything with that wattage.