Every meet is a little different. Call you local meet director, tell him its your first meet, and ask if he had time to answer a few questions, and have a few written down. At the meet, don't be shy, and introduce yourself to some of the officials and ask if there is someone in your class that they know of who would be willing to show you the ropes. There probably will be. At my first meet, one of the other lifters basically held my hand the whole time and acted like my handler, and it was invaluable. I did not know anybody at the start and did not have a handler, at the end I had a lot of new friends. Again, don't be shy, and don't be afraid to tell people that its your first meet.