Do any waiters have any advice for passing the trial shift?

I have my trial shift in a couple of hours and I'm shitting myself, its the first time I'm working as a waitress so I dont have any experience and I'm scared to mess up.

Do any waiters/ waitresses have any advice for me? Im mostly terrified of using the till, and also in the comments could you share how you usually address the guests? Like what do you usually say to them before taking their order, i feel like I'd be terrible at small talk

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