[D] First time reviewer. I got assigned 9 papers. I’m so nervous. What if I mess up. Any advice?

I’ve been working on tech industry for about 7ish year and this is my first time ever reviewing. I looked at my open review tasks and see I have 9 papers assigned to me.

Sorry for noob questions

1. What is acceptable? Am I allowed to use ai to help me review or not
2. Since it is my first time reviewing i have no priors. What if my review quality is super bad. How do I even make sure it is bad?
3. Can I ask the committee to give me fewer papers to review because it’s my first time

Overall I’m super nervous and am facing massive imposter syndrome 😭😭😭

Any and every advice would be really helpful