I'd like to address something in your post... though I won't really answer your question. You definitely don't need any medical intervention to be FTM. You might need it to treat your dysphoria or to help you pass, but if you self-identify as male, then you're male. End of story. Others in your life will have a harder time accepting that, but you shouldn't have any difficulty with that around here.
The reason that I'm not really answering your question is that I'm nonbinary and coming out means something very different to me for now, as I'm not asking many people do change what they call me. As such, most of "coming out" for me is just telling people that I identify as transgender. I don't want them to change how they treat me, and most people haven't. Sometimes I tell them a little more, but I still haven't figured out my gender, so I don't have much to say. I guess I've been "living out" without "coming out." I don't hide, but I don't share much.