It'll be just fine. Honest. My first appointment i was freaking out big-time over it...even though my social worker came too. But the woman was well aware i'd be worried, scared, anxious etc it being a first appointment...and she was really sweet and gentle about it all.
I'm sure you'll be just fine too. You'll be in my thoughts though as it's a big step you're taking and i know whatever i say won't stop you being nervous etc anyway. Maybe it will help a little to keep all of us here at pc in your mind...that's what i do now for things like that.
Lotsa Good Luck and Best Wishes...and please be sure to let us know how it goes?

roz