You need a ratio of 2 females to 1 male, otherwise the females will be harrassed which may eventually lead to illness/death for them.....
Do you know about DGIV?
Dwarf gourami are a bad species to buy ATM i'm afraid, i'd look into thick lipped gourami or honey gourami....
Not sure about compatibility with rams, i know very little about cichlids, if indeed they are cichlids.
I'm sure someone with a brain will post soon.