I work for a very supportive company (3M) in a very accepting state (Minnesota). I knew long before I came out that I would have corporate support. Individuals might be another matter, but more later. We already had documented transition guidelines, both for the employees and for management. I knew a number of women that had already transitioned in their role, and all were happy with the process (though a common belief was that you would likely not see any more promotions – a belief that has been disproven).
For myself, I had already started electrolysis and HRT. I had been living as a woman in various capacities for a while. Working from home 100% made the need to come out at work a non-issue, or so I thought. As I came out to more friends and family, I realized how much not coming out at work was impacting me. So I arranged a meeting with my manager. After I told him his first words were “So, how can I help?” It was a very common sentiment. When I came out to my VP he let out a sigh and said something to the effect (Is that all? I was worried that you were going to tell me you were retiring.” And for the most part everyone has been massively supportive. There were a few folks that seemed to cut my coming-out call with them short, but no actual issues from anyone. I spoke with over 100 of my co-workers (working there for nearly 30 years at the time, you get to know a few folks). When the day came to make it official, it was up to me. I wrote the email, had collected the distribution lists, and sent it out. And the congratulations and positive messages started coming in almost immediately.
Oh, a college professor friend of mine (from a different, more red, state) had the same experience as I did with my VP – “Is that all? I thought you were going to retire.” type response. She has been very happy since she came out.
I wish you all the best.