As others have said, go gliding!! I used to do lots of tractor driving in my gliding days, and those, to, had no rollover protection (and it was a hill site, so by no means all flat). They are very simple machines - like a heavy, slow car to drive, but with a hand operated throttle.
I've also had a go with a bulldozer. Driving the beast was easy (hand-operated steering clutch levers for the steering, with differential foot brakes to lock the tracks), but my attempts to level a piece of ground left me with deep respect for anyone who can do it. As the 'dozer tilts on the rough ground, the blade digs in and tends to bury itself ever deeper, or rises and dumps a mound of earth for the 'dozer to pivot over. The secret is accurate and anticipatory tiny adjustments to blade height - and there's a lag between oprating the lever and the blade moving.
Makes aeros look simple :lol:
SSD