What did you go to school for?

I’m so stuck on what to do with my life. I’m currently a manager in a restaurant and it doesn’t pay well, I’m always exhausted and I just never see my kids. I have the option to finally start school this fall but I have no idea what I want to do with my life. I always wanted to be a teacher or something in the medical field since they are always in demand. What did everyone go to school for and was it worth it? And if you feel comfortable can you share your range of pay?