3rded on the above advice, I remember my first group ride out, I hadn't got used to my bike (a bandit 600) and I did not enjoy the ride at all as i was terrified of making a mistake or not being experienced enough to ride in a group safely. Learn both yours and the bikes limits before attempting a group ride out, as you'll find the majority of the group are vastly more experienced and therefore more aware of whats going on around them.