Agreed, probably would be better if there were a diverse set of main communities for users to start off on. A women-centric jumping off point would be great, but as a dude I can't really do much about it.
Personally I think filling out the vanilla some of the subs would be good to help drive traffic, which in turn helps determine which of the more niche ideas are wanted. That’s why I made !porninfifteenseconds@lemmynsfw.com. Some other broad ones could be general nsfw, nsfw_gifs, (is gonewild still a thing?), and maybe a rule34 com.