Welcome cadet!
Expanding on what @xiph has said, I recommend showing up around 20 minutes early so that the Duty Officer (he’ll have a “DO” tag next to his name) has time to get you sorted out. The shift will last for about 4 hours. If you need to leave earlier than that bring it up with the Duty Officer.
If you have any more questions, please ask! I look forward to seeing you.
o7