Take the talent show, the open mic, the school gig. Small stages teach you not to shake on the big ones.

Nerves are not something you think your way out of. They fade because your body has been through it before and knows how the room ends. A hundred people in a gym is practice for a thousand somewhere else, and the practice only counts if you actually stand up.

Say yes to the next small thing you get invited to do in front of people. A class presentation, an open mic, reading something aloud at an assembly. It will feel too minor to matter, which is exactly what makes it safe to use.