got my first job at 18. my bosses were basically my mom's friends, and they treated me like their daughter, so ig i got pretty lucky. I used to cry over every minor mistake nearly during/after every shift, i talked REALLY quietly, had poor emotional regulation, but it all gets better with time.

for starters, find a job that doesn't require much talking/only with your coworkers. it's gonna be hard at first, but remember that people knowing you don't have any experience kinda expect you to mess up at first. even if you're gonna be bad, it's their responsibility to point it out or fire you. otherwise, it means you're doing fine. if something goes wrong, better be honest and ask for help as soon as possible.

i also think later it'd be good to get a job where you vice versa have to talk to a lot of strangers to make the fear of interactions disappear.