I am also in Indy, and have been immersing myself in the hobby lately. Are you guys familiar with Circle City Aquarium Club? I have not attended a meeting or function myself due to time constraints, but it looks like a good organization who welcome new hobbyists. There is a user on this forum who is the Horticulture awards chair or something like that. Her user name is JenThePlantGeek, I think.
Anyway, maybe that club would be what you are looking for, rather than starting a new one.