Thanks everyone! I contacted the OC Wheelmen and they said that I should be able to comfortably ride at least 12-15 miles at a 12mph pace before I'd be ready to ride with their team. I have a 10-14 mile route planned for Sunday, and it's an out and back so if I get tired I'll just turn around and head back.

I'm super stoked! I'll report back and share some photos of "My First Ride", can't wait!!!