No problem. Don't feel bad if you're new to the whole thing.
Call Kareena at The Office. She's very nice.
Make an appointment with one of the girls at whichever location she might be and is convenient for you. Much like a Doctor's appointment.
Get proper info, re: address, intersection, suite #. Confirm the $ amount on the phone in order to avoid an uncomfortable scene with your young lady.
If you can, be freshly showered (you'll have the option there as well), dress well and conduct yourself no differently than going to visit an SO during the beginning of a relationship.
Be on time. Be polite and show some finesse.
Good Luck and Enjoy!