Hi Melissa Marie,
I don't think there is any set regimen. It depends on the endocrinologist, and your age and health. I have read many accounts here where trans girls get estradiol right off the bat. That was not my experience. I am older (58) and just started hormone therapy a few weeks ago. I got a very low dose of spironolactone and finasteride. I was hoping for a more aggressive regimen, but I think there were reasons. I was on lisinopril for high blood pressure, and that medication can cause elevated potassium levels. So can spironolactone, so there may have been some concern there. I also smoked occasionally, and that significantly increases the risk of thromboembolism with estrogens, so again, I think that was just being cautious. Now that I have stopped smoking completely and I am off lisinopril, I hope I will get a change in my hormone prescriptions.
You're so lucky your wife supports you on this! I wish you all the best.
With kindness,
Terri