Good morning everyone

Just looking for some advice and tips for my first endo appointment since its less then three weeks away. I would like to say that I've prepared myself pretty well for the first visit. I don't smoke, I've cut out soft drinks pretty much apart from like one a month or so. And generally have eaten a lot healthier then before. And it must have worked since back in June this year I weighed 196lbs and have brought my weight down 168 where its hovering pretty much. And going my weight calculators its putting me underweight for a male but just fine for a female. It must be why I am hungry all the time.
Anyway I already know the first thing the endo will do is to draw blood to check levels. Which I'm curious to see as at the moment I'm showing at least signs of having low testosterone. Which of course I take with a grain of salt but still its interesting. Now here is the thing I've pretty much have been sticking with a vegetarian diet for over three months now. And one of the main things I do use is tofu which I know is high in phytoestrogen along with some other food that I eat often. Now would it be a good idea to cut this out before the appointment? As I don't want to mess up the blood test and have a low T and showing high E and getting the wrong dose of hormones.
Also is there a preferred way to take estrogen? I know that patches are the best and safest way. But going by research since I'm still under thirty I'll be twenty seven in a couple of weeks the pill form should be fine. And the best way to take it is under the tongue and split it throughout the day to avoid mood swings.
Other then that is there anything else I should really ask her? I already know all positive effects of HRT along with what some could consider negatives such as low sex drive which doesn't bother me.
I don't see myself really having any trouble at the appointment. As I've already have proven that I'm serious about my transition since I'm already full time and have changed my name.
Also one other thing would it be faux pas to ask her to sign the social security document saying that I can be changed to female in the social security database or should I wait a couple visits?
Thank you,
Raven