I'm new

[Freakgecko91]

Most dwarf (mostly west African, south American, and some tanganyikans) cichlids will do well in that size tanks. the following list are cichlids suitable for your tank.

South American genus/species (almost all will work in a community setting):
Ivanacara
Nannacara
*apistogramma (second most commonly seen of the SA dwarf cichlids)
Dicrossus
Laetacara
Mikrogeophagus (rams; Bolivians are much hardier than the German blues)
Cleithocara maronii (keyhole cichlid; one pair with a small school of tetras would work)

West African (some will work in a community setting, mostly pelvicachromis sp)
Pelvicachromis (most common is p. pulcher, also known as Kribensis, or kribs)
Jewel cichlids (kinda pushing it but could work)

Tanganyikans (will NOT work in a community setting)
Neolamprologus sp. (like brevis, multifasciatus, or ocellatus)
Brichardi
Leleupi (if I'm not mistaken)

 

[Meganns]

What fish will work then not just that kind but all kinds

 

[Freakgecko91]

Another one I forgot is a pair of angels (south american, community able), convicts (aggressive breeders, not the best for a community), amatitlania sp "honduran red point" (commonly called Honduran red points or HRPs for short; work well in a community tank), and many of the cryptoheros species (my personal favorate is cryptoheros cutteri; but they aren't exactly the best for community tanks).

As for what they can be kept with, it woul look nice to do a school of tetra, like rummynose, lemon, serpae, bleeding heart, etc. You usually want a school of at least 6-8. Cory cats wrk well on the bottom, needing a shoal (swim together but don't always follow the same direction, stay in group, not tight packed uit) of at least 4 IMO. Kuhli loaches are a fun and interesting bottom feeder that you could add as well. A small species of pleco will be fine too, like a bristlenose, clow, or if you're adventurous and don't mind spending the extra cash, a leopard frog pleco or a queen arabesque pleco