I came out as gay and trans prior to having access to the internet (in the 90s only middle class kids had computers where I lived), so in terms of my original awakening as a gay trans man, the internet didn't play a role at all. It definitely has helped me refine my sense of myself as gay and trans in later years, though. As far community-building, I'm not involved in any online gay or trans communities, apart from chatting to other gay trans guys on mastodon, so I'm not really sure how to answer that one to be honest!