Have an interview with your bishop. He will probably talk to you about your testimony and your feelings about Jesus.
Ask someone you know about their first temple trip.
Pick out some clothes that you would wear to church and get them ready the day before.
Put your recommend in a place where you won’t forget to bring it.
Put long hair in a braid or ponytail, and bring a brush to use afterward.
Pray to feel the Spirit, and pray for the people you are doing temple ordinances for.
Listen to uplifting music on the way to the temple, like what you would listen to on Sunday.
Don’t worry about not knowing what to do. There will be people in the temple to help you every step of the way!