Hi Abigael,
A big Aussie welcome to Susan's family. It's good of you to drop in and say "Hi". Hope you like it here, and you stay for a while.
There is a mountain of information, resources and friendship waiting for you here, you just need to jump in start talking and ask any question you like. You're quite safe here and we are very accepting.
In answer to your two questions, your therapy session tomorrow will probably be no more than a meet and greet session. Your therapist will just want to get some general thoughts and ideas on how you work and feel before they get into the deep stuff. Sort of ice breaker session, where you both have the opportunity to weigh each other up. Just relax and be open and honest about your feelings and everything will be OK.
Not knowing where you are, you really shouldn't have to be full time for ANY period of time before HRT. If your therapist demands that, find another, immediately. As to what to expect, that's a hard one. We are all so individual, and depending on the particular drugs he prescribes will vary from person to person. However, you should experience some breast growth, fat redistribution, change in body hair growth and size, and most undocumented aspect, psychological changes to the way you think and feel. That is just some of the major things you should experience.
Looking forward to hearing more of your story in time to come, but in the meantime, be safe, well and happy.
Lotsa huggs
Catherine