Social anxiety

I am growing up fast. Too fast than I would like to, but I know I can’t do anything about it. I’m gonna be 17 in less than 3 months, it’s crazy. I’ve really been wanting a job, so I can make money, but myself a car, save money for things I’ll NEED in the future. But I have super bad social anxiety. And I hate it. I think all the time about having to go to an interview, and I get super nervous and shakey just thinking about it. I’m scared I’ll say something I shouldn’t, and then I won’t get the job. Or if I ever become cashier, I’ll count the money too slow or count it wrong. But I know I’ll have to get a job eventually. The only job I’ve really had was babysitting, and I made good money off of it, but I was never smart with my money. I always spent it on something pointless so quickly. So, I’m wanting to find people who could use a babysitter, so I could make some money until I start working at a store or something.