I would start a regenerative agriculture farm. I.e. growing food in the same way it naturally grows in a forest (or savannah etc.)
Ever since I became I dad, my attention has been on what we're putting in our bodies -- intentional or not, food or not.
So much of it is rubbish.
It seems incredibly hard to eat fresh, wholesome food from the part of the earth where you live.
I want to make that a reality for at least my kids, maybe more.