You can go on "lesbian" websites/forums and to social groups, bars, etc. It is NOT invading as it is not as though you are a heterosexual man or someone TS/TG who is insisting that lesbian women date and have sex with men.

I generally avoid reddit, Chan, and other websites as they are not that good and are a mess like you said.

I would suggest local bisexual social and discussion groups but they tend to be overrun with LGBTQWHATEVERUSELESSLETTERWILLTHEYADDNEXT and professional activist types. They are not bad for making friends but I am not there to talk about transsexuals, or anything not really related to bisexuality.