Help for a Contest

Hey everyone! At my high school, they have a "talent show" every year, and this year I'm planning to compete. The only problem is, I have two issues:

I've NEVER performed magic for anyone outside my close family or friends, so I'm not sure if my hands will shake, or if I'll get super nervous.

I'd love for you to recommend some effects for me to perform. I was thinking about Tamariz's Total Coincidence, since it's very visual and impactful, but I'm not sure what to follow it up with.

Mostly, I'm writing this about my hands. I'd love to know if there are any relaxation techniques that work for you all, because I've tried some, and they only relax me for the first 20 seconds; then I can't even pick up the deck again.

Any help would be greatly appreciated, and thanks for reading!