I do things that make no difference globally because I don't want to take part in the bad things.
I did not vote for the government that is ruling my country. My single vote did not make any difference, but it makes me feel better that I did not vote for this government.
I travel by train instead of a plane and I ride a bike instead of driving a car because I don't want to be part of the club of high CO2 emission citizen.
Doing that does not matter globally, but I feel better about myself that way. I don't tell other people what to do or to follow my example, but I think some people around me do notice and maybe it does get them thinking?
But I have no illusions, most people are busy enough and do what is most convenient every time. I am the only adult in my circle that does not own a car. But I feel powerless beyond my personal life to change anything.
I know it is not good enough, but I don't know how to change other people.
I did try and sometimes I still do try, but to no effect besides annoying people. 🤷