Absolutely petrified…
Will I be able to find the place, what if I take a wrong turn and get stuck, oh heck I’m going to have to get it onto a bay all on my own, blimey this thing is HUGE, oops, didn’t mean to cut the kerb quite so much there…
etc etc etc
It is terrifying when you first start out. Just breathe deeply, count to ten as many times as you need, and remember that someone has almost certainly been there before you and managed okay. Take it slow, use all the room available to you, command the road where you need to and steal an extra lane to keep yourself safe. Don’t be afraid to ask for help - people like to help, it makes them feel better about themselves.