You don't want an anemone any time soon. They don't have a good survival record in aquariums and they especially don't do well in new tanks. What kind of fish depends on what kind of tank you want. Do you have LR
? What kind of light?
I would think (for a reef) maybe a yellow tang, a clown or two, a coral beauty although they aren't always safe around corals, and maybe a blenny of some kind.