It will be your first live performance, so don't expect to do your best moves. Maybe you will be stressed and it will become even harder.
Your public probably don't know a lot about nunchaku, just do a routine with all your basics moves you can do each time with no drops.
A public who don't know a lot about freestyle nunchaku don't like drops, then just need a flashy show. But don't try to go faster than your normal speed, just dowhat you know and it will be enough.
Some tips though.
Sometimes, which the stress it's hard to begin fast. Try to start with a short and easy introduction, it will help to "enter" in your freestyle and forgetting the public around.
It's even more stressful to start with a drop.
Most demonstrations start with a single nunchaku part and finish with a doubles nunchaku part.
You can also watch a lot of live performance to be inspired, but just do YOUR freestyle, you don't have to do the best performance ever.
Good luck for your performance!
Just have fun, give your best and enjoy this amazing moment!