Congratulations on getting the process started!
I agree, the waiting is hard. Things take as long as they take, sometimes longer.
For sure, the endo will want to get a blood sample off to the lab, get the results back, and determine the best meds and dosages for you. That will require at least another appointment to review the results and get your prescription. So even on a fast track, it will be a couple of weeks.
And then, you are right, it takes months or even years for results to become apparent.
So while venting about your frustrations here is always appropriate, and you will find sympathetic ears, it is good to practise killing time while you wait.
Have you started facial hair removal yet? If not, now is the time to start. That is something concrete that will tell you every week that you are making progress.
Are you presenting part-time or full-time? If not, those are things you can work towards while you wait.
You can go on regular clothes-shopping trips to start building your wardrobe. Learn where the good second-hand shops are. Almost nothing in my closet is new, and the few new items I have were purchased heavily discounted. So it doesn't have to be expensive.
What I am getting at is to find little ways of making regular progress while you wait for the big steps. Because this journey involves a lot of waiting. My most recent "progress" has been waiting 11 months for an appointment date to see a shrink for my second surgery letter. I am still waiting, and that's just to get the date. Once I get it, I'll still have to wait an unknown amount of time for the appointment itself. If I wasn't full-time already, I would go nuts. The weekly face-frying reminds me that I am in fact moving forward.