Don't get damsels! A lot of fish stores recommend them as fish to cycle the tank or "test" the tank. It's just not necessary, and you'll be left with some mean fish that will attack any other fish.
Assuming you have live rock in the tank, wait for the ammonia and nitrites to both be zero, do a water change, then start stocking your tank. "Easy" fish are good to start off with, including clown fish, some of the gobies, cardinals.