Congrats on your first experience! Like the others have said, they are rarely perfect. Not just the first one, but any of them. But, they are almost always fun and exciting! :)
For us anyways, we didn't approach perfection until it was with friends we had been together with several times. Then, the nerves are gone and everyone is totally relaxed. Best thing is not to judge yourself or others too hard and just take what comes and enjoy the ride, and then that's when things get perfect.