For a 10g I would concentrate mainly on corals, not fish. Not to many fish that I would recommend for such a small tank. Maybe a Panda goby if available, about $50. Or tiger/fusa gobies for about $20. I'd try to fill it with mushrooms and zoas. Maybe some small LPS like hammers, frogspawn, torch or galaxia. A handful of hermits, snails and one white sand shifting star. One sixline wrasse would be plenty of fish. I'd at least look into either a nice canister (Eheim 1213) or a HOT (like whisper) to add some currents if not adding a powerhead.