Which employment contract should I use?

Name: Which employment contract should I use?
Start: 2024-05-03T10:00:00+12:00
End: 2024-05-03T10:30:00+12:00

May 3 @ 10:00 am - 10:30 am

Fixed-term, Full-time, part-time, casual, remote workers, lower guaranteed hours agreements….there are so many, but which one should I use?