CityCycleGal, are you going to the "instructional" ride on the 27th? You will learn all the "protocol" for riding in a group there. I think there will be parking lot practice and then a 10 mile flat ride. The instructors for this are really good, so take advantage of it. You should be fine to do the "easier pace" group on the New Members Ride on May 11th after you take this class. Lamar (who spoke at the workshop) and my friend Janine, who has bee an AMC leader for 20 years lead this group. We won't look quite like the groups you see whizzing past!
2015 Trek Silque SSL
Specialized Oura
2011 Guru Praemio
Specialized Oura
2017 Specialized Ariel Sport