Advice for first time workers?

I have social anxiety.. I haven't had a job yet & I'm 21.. I know, I know. Very late, sorry but I'm afraid any job will turn me down since I haven't had any experience. The thought of going to an interview kind of scares me so are there any tips you could please give me? Such as questions they'd ask & how to answer. What to say & what not to say? Thank you very much 💛