I worked with few of them, I think its a more Mon-Fri job sometimes you have 12s. typically days. Can sometimes be shift work. Pretty wide range of stuff in the medical setting you will work on / have to know. From dental chairs to xray equipment.
Tech school is about a year and has a higherer wash out rate than most jobs. As long as you have a good background fixing stuff, putting it back together and working with electronics it shoud be easier.