My suggestion is to ask up front things you may think you need as therapy progresses.

1) Do you allow phone calls outside of session?
2) Do you allow emails outside of session?
If so, do you reply?
3) What is your position on hugs in therapy?
4) What is your approach - CBT? DBT? other?
5) Do you accept small gifts from clients such as holiday card or birthday card?
6) What happens if a session is missed?

Those are just questions I have on the front of my mind right now.
Bottom line is to ask things that actually matter to you.
Get those questions cleared up front so you don't spend time wondering what the answer will be.