i'm just starting out and i am a bit unsure what fish will live quite happily together. my tank is 24" x 12" x 18" and i currently have 12 fish in there.( 2 zebras, 2 cloud minnows, 5 neons and 3 guppies). i'm open to suggestions.
Get another 3 Zebras at least, they are schoolers, same for the Cloud minnows. Other friendly fish are pretty much any live bearer. Platies, Mollies, Guppies, Endlers, Swordtails.