How old are you ? With 18 000 hours I’ll take a guess at 50+, same as me. Unfortunately at our age it’s a bit late to start out in a new profession which requires 5 years training and a few more years experience before the $$$ start to become meaningful.
If you have the flair for it, being a salesman offers good income potential with little training required. Otherwise driving jobs always come up, if you can take 12 hour shifts FIFO on the mines in WA can get you $110 000 a year