Blue, you have done a great thing. Courage! You found the courage to pick up the phone. Now the next step is the courage to follow through with the decision.
If you need to told it over...brainstorm...yell and scream...cry like a baby...you have found the perfect place to do that. Whether it is multiple time a day, or less.
Most of us in here have been in and out of therapy for most of our lives. For various reasons I have been in and out since I was 15, I am now 58. My therapist before this one...1979 to 2002...when I move to another state.
It may take you a couple of months to get to your problem, it may come to the surface on the first visit. Whatever time it takes, just remember that you are in charge of each and every session. Any good therapist knows this by way of their education.
If the therapist appears to be pressing you to open up and you are not ready, you need to speak up. Therapy should not be about pressure.
If you are not comfortable with the therapist, again any good therapist, knows that your comfort level is more important than his/her being "rejected" by you. If you see a guy and you are a gal, and a guy makes you uncomfortable, you have every right to make a change to a female. And, vise versa.
The one part of therapy I don't like is the quiet spaces. When I don't talk, Dr.Jim is silent too. A sign that he knows to allow me to control the session. Like today...we had a quiet space a couple of times...I would chuckle, since they make me anxious, and tell him of my dislike for the silence, which would then lead me to say something else, and hence, another conversation begins.
There are a lot of

in here...So, let's talk about your anxiety between now and your first appointment...OKAY!
We can all identify with these words:
"Fear does not have any special power unless you empower it by submitting to it." --Les Brown
"People have a hard time letting go of their suffering. Out of a fear of the unknown, they prefer suffering that is familiar." --Thich Nhat Hanh