If a universal basic income started today with the stipulation that you had to put 40 hrs/wk towards making the world a better place or solving societal problems, how would you spend your time?

I was an Ocean Lifeguard for several years after high school. I would do go back to that. Service to others fulfills that contract to make the world a better place. I loved that job, and I know I impacted several families for the better during that time.