any tips for me??[/QUOTE]
If you have never ridden in a group ride I would recommend that you first practice holding a line. That is keeping the bike moving in a line without going side to side and using counter steering to move side to side to get around obstacles.
Second, find another rider and get on hard packed grass and ride parallel while bumping each other. Also practice putting your left hand on their shoulder and then looking back. People who don't get use to bumping often hit the ground when bumped b/c they over steer.
Riding in a pace line can be dangerous and I would recommend getting practice with one other person for the first few times.