Hi, Ari
Welcome to Susan's
When I came out to my wife, I realized that it was something that I just had to do. It took me a long time to work up the courage, but eventually, I just had to do it, no matter how hard it was. I made sure that I was ready for her most obvious questions: I had no desire to leave her, I was leaning towards full transition, possibly including surgery, and the next step was to talk to a therapist.
It went well, but of course, that is not always the case. Think ahead about what you will do if it doesn't. Hope for the best, but plan for the worst.
Good luck!