Awesome Melissa!
Forgive me if I sound like some sort of interviewer and you are certainly right, "results may vary" but what I am hoping I guess is that people who are unsure how to take that full time step can read your story and others and gather ideas to help them on their journey.
So it sounds like you had a core group of people close to you who were supportive both at a personal level but also at a work level, who perhaps had some prior knowledge of your transition so they were ready to support and back you up so to speak and perhaps also provide an example / leadership model of acceptance? You also sound like you have a very firm handle on your own identity, emotional state and needs. Was this always the case or did you have to develop this self acceptance and maturity with the help of professional counselling?
BTW understand COMPLETELY about the sense of relief once it is all out there. Funny thing is it wasn't just me who felt this, but also my wife and kids as well as our staff at work.