I think you need to think of it from 2 perspectives. What if I only had 5 years to make an impact and what if I had 20. The UN has its 17 sustainable goals [1]

I think you need to think of it from 2 perspectives. What if I only had 5 years to make an impact and what if I had 20. The UN has its 17 sustainable goals [1] which can give you a better idea of what challenges face us at a macro level. Start with your skill set, what do you have a unique advantage in that others don't? Are you a biologist? Work on creating more nutrient-dense banana or something. Know how to code? Solve a simple problem that wastes tons of time at a large scale (help your DMV or help people navigate something cumbersome using tech). [1] https://www.globalgoals.org/take-action/?id=1 https://www.globalgoals.org/take-action/?id=1