First Job Interview!!

Earlier today, I applied for a job at a local fast food restaurant. I didn’t expect a call back so soon, let alone a call back at all because I’m only 14 and many places don’t hire until at least 15, but they called me back about an hour later and set up an interview with me!! I’m incredibly excited but so so nervous, as this will be my first interview ever. Any tips on how to rock this interview, ladies?