What comics should I read to know more about Tamaran

And tamaraneans. I just want to know more about them and not just Kori. Where should I start? And what else should I read.

New Teen Titans Vol 1 1-26 and annual 1 is an excellent start

Yeah, just reading through the New Teen Titans series of the 80s will fill you in on plenty about Tamaran and its residents. It’s sort of a must-read series, so get on that!