Well, first, congratulations

If they are helpful they can help you along.
If not look for another.
If you'd like you could do a little research on them on the internet... maybe you see one or two reassuring reviews...
You might call there, say your name and that you are transgender and would like an appointment.
You might also ask if they have experience with transgender people.
Well imagine calling for a take away pizza

Just relax, it will all turn out right

In the sessions and afterwards I'd say listen to your feelings... and ask questions if you have any...
Same here... just ask questions and talk... and keep us posted

*hugs*