I came out! So far I've gotten a few reactions.

Facebook: The vast majority of my Facebook friends have been supportive, and I've gotten to reconnect with a bunch of old friends that I lost touch with because of it. I've lost some people, but most of them have left quietly, and to them I say good riddance. To the few that didn't leave quietly, I've been defended vehemently by my friends that are supportive, even some ex-SO's, so that's awesome.

Parents: My dad sent me a brief email back, where he didn't misgender me or deadname me, but he was very ambiguous and vague and basically said he needed time, but he figured something like that was up. No response from my mother or either of my sisters, which is about what I figured, but I'm sure they're taking the time to do research on their own, and that's not great. I'm going to have to wade through a ton of misinformation when they finally feel comfortable talking to me again.

Extended family: No response. Several of them have deleted me from Facebook.

So yeah, it's done. I'm still losing sleep over it, but I feel 10 tons lighter and with my name change court date right around the corner, I feel I'm at the brink of getting rid of the poison fake person entirely.