What type fish do you like?
You could do a community with fish like an angelfish, dwarf or honey gourami, a school of tetras like cardinal, rummynose, or lemons. A school of top swimmers like marble hatchetfish or threadfin rainbowfish, and some bottom swimmers like cory cats.
A rainbowfish tank with different colorful rainbowfish with something like yo-yo loaches for bottom swimmers.
Or a african cichlid tank.
You have alot of choices.