I did a monthlong internship for the Boston Fire Department in High School, and part of what I did involved informing people about employment with the FD. This doesn't necessarily all apply elsewhere, so keep that in mind. There are no real educational requirements, but in practice you will probably need at least a high school diploma. The reason for that is that FD jobs prioritize veterans, and all branches of the U.S. military require a HS diploma. When I say that they prioritize vets, I mean it: Boston Fire has not employed a single non-veteran for the better part of a decade. There is a physical test, but that's all information that's available online and is in no way difficult to prepare for (or very difficult to pass). Bring gloves to the test to avoid hurting your hands on all the ropes and ladders. After that initial physical test, you go to 16 weeks of training to become a firefighter. Don't even think about it if you're afraid of heights, because there's a lot of very tall ladder climbs. I'm happy to answer any questions you may have.

That goes away with time.

That whole album is good

It's fine not to think of machines as your own kind, and it's fine to make machines to do things for you like a slave. But if you give your machine the ability to reason and and become self aware, you should stop treating it like a machine. If the A.I. wants to continue doing the manual labor, then by all means let them. If they decide that whatever task is too menial for them, they have the right to do as they please because you gave them sentience. If you don't want your machines to become whiny bitches that don't want to work for you, don't skirt the edges of sentience just to make your life a little easier.