Easy to figure out relative ages here by looking at the per-hour rates...
Anyway, first jobs were babysitting, walking beans, detasseling corn. I actually opened my first checking account with my detasseling check (we were paid at the end of the "season") of oh, around $140-some. Babysitting was 50 cents an hour, regardless of number of kids and there was a mom across the street who never rounded up. Once I was there for an hour and a half, and she only had two quarters so sent one of the kids back with the third quarter when she got it.
W-2 worthy was probably nursing assistant at our local nursing home. Worked there spring and summer before I went to college -- ISU. No training needed at the time, and I took mental note of those who worked there. At 18 with no experience, I was more competent and compassionate than many of them. Some stories for another day and another thread, but the closer I get to retirement age, the more I think of that work experience and hope things are much better.