Congrats! I remember my first appointment with my gender therapist. I spent the entire time just talking about myself and what I hoped to accomplish with the sessions. Before I knew it, the hour was up. Nothing much got done... it was more of a get-to-know-you type of session. So I scheduled my next session just 3 days later, because I felt like there was so much more to say.
You might want to consider scheduling your second session very soon after, if you end up feeling the same way I did.