It's great that you took that big first step and tried a group ride. Many cycling groups have rides of varying paces and distances, so perhaps you'll be able to find a ride that is more your pace and distance. It's also a really good idea to have a map or cue sheet regardless of the group. They might not wait for you in the future, or the nice woman on her recovery ride might well want to go faster on the next ride. Ask about cue sheets and different paced rides.