Marketing towards gay community online

Hi

I’m gay but not a marketer, I’m a developer. Currently I’m working on non-adult gay website/community. I’d like to get potential users before I go any further. I’m not sure where to start advertising.

I don’t know many online gay communities, except for dating apps, but I don’t want to go there. Facebook seems like a good option for advertising. I’m not selling any products or such, I’m not targeting any specific gay niche, my plan is to target gay community in general because the plan is to create a private online community for gay people with verified members. It would be invitation-based system, meaning that you can only join if you are invited by another member and once you are verified you can start contributing and s get full access.

Can anyone give me some tips?