Does anyone here work in the mental health & substance abuse field?

I live in east Tennessee. I am wanting to go to school and get a degree in mental health and substance abuse. I am looking to see if anyone here works in that field and can tell me what you did schooling wise (how long, what classes,etc), and what you do day to day. I want to work with people suffering from addiction. I’m kind of lost on where to start. Thank you!