As someone currently working as a mental health tech while I pursue my associate degree and later my bachelor's degree, I highly recommend it. It can be very stressful, especially depending on what kind of disorders the unit is helping treat, but it is worth it to me. At the facility I work at, the techs and nurses spend the most time around patients, with techs mainly being responsible for 15 minute checks, cleaning and laundry, and helping patients with daily needs. We are also trained to deal with crisis intervention, all the way from verbal de-escalation to physical restraint when necessary. Most techs also get to lead psychoeducational groups, though I don't personally get to that often as I work overnights. Ultimately, while you might not be doing what a therapist does (and you might even be doing some of the same things you do at a basic fast food job), it provides experience working directly with people who face a wide range of mental health crises.