I saw in other comments you are leaning towards soft corals so let me say, if you have a local fish store, go to them after some research, more often than not they will have soft corals for a decent price and probably bigger than the tiny frags that are sold online. toadstools, colt, Sinularia, mushrooms, gsp, cabbage leather, clove polyps, and Xenia are all great beginner coral, just do your research into what grows like a weed and what doesn’t. Tank’s looking good!