I agree with Ryan, if you are wanting to start with an african, Electric Yellows are relatively easy to start with When starting out, sometimes it is better to start with one species together and then feel your way and research alot, compatibility with africans is a trial and error thing, some work, some don't... I would definately keep a solely african tank tho, and give the idea of adding convicts a miss Your tank is relatively small so territory as fish mature and get to a decent size will be a factor, might then be time for an upgrade :lol:
Have you ever looked at Dwarf Cichlids (American) they do well in a nicely planted tank.... Rams, assorted Apistos, Dwarf Nano's, Bolivian Rams are available here... very addictive to some :lol:
Or maybe some Tanganyikan africans that don't get overly robust and big, like Brichardi, Pulchers, Julidochromis... Brichardi are easy to start with 8)
Anyway, keep us posted and good luck!