I have no work experience, how do I get a job?

This is my first time posting here, so I apologize if I do something wrong. I am 18 years old, and I've been trying to get a job for the first time ever, but I do not have any work experience. I am not really sure what to do, and I have been feeling very nervous and inadequate. I feel like I would be more suited to a job with a lot of training, but I don't know what kind of jobs are like that. Or if there are not many jobs like that, where I can get one with lots of training. I am not picky, I just need something that will help me get a lot of experience to help me in the future. Any help would be greatly appreciated. Thank you.