I have social anxiety, but I desperately need to get a job because we’re quite short of money. I’m 17 years old and I’ve never been employed before, so I don’t know what to expect or how to act. Do I tell employers about my anxiety and that or will it make them turn me down? And also what sort of jobs would be easier for me to cope with?
Personally, I wouldn't tell any employer about any mental health issues, especially not at an interview. You don't know how someone will react, and people without a mental disorder are not always respectful. (To be fair, it's often hard to respect someone's problems until you know them.)
Interviews are one of those things that you just have to practice. Is there a career center nearby, or a counselor at school who you could practice with?