I quit my job as a bus driver on my second day because I was stressed out about hurting kids. (Yes, I know school buses are among the safest vehicles on the road; it was an irrational fear.)
But the other part of the equation is the schedule.
You are hired as a part-time employee, no benefits, but the schedule is such that finding a second job is unlikely. In the district I trained in, the schedule was 6-9, 12-2. Those are awkward hours to work around.