small scale indoor gardening of som herbs, tomatoes or other similar plants easily grown on a balcony or within the kitchen
political action like local protests or even better get elected
volunteer work in some sort of progressive charity
organize a tenenant union or become active in the hoa
There is plenty more, the key is to make the world better and not try to make it perfect. A lot of usefull action is community driven and in those roles you can have a much much bigger impact then by just changing your own way of life.
Some regions allow you to choose your electricity provider, which allows you to buy certificate based "green" electricity.
Then there are small scale solar installations, which might work or even large scale ones, if you own it within a hoa.
My town provides this option - including various shades of green energy. We're currently on "100% green" but like 40% from burning garbage at the landfill for power generation. This year they gave the option to do entirely solar but I haven't gotten around to it yet.
I'll admit I don't know much about how they allocate power (sourcing or distribution). I always figured my electricity was coming from the same pool as my neighbors regardless of the sourcing I was paying for, but if I can encourage my town to switch to green energy faster, that seems worth doing.
@JacobCoffinWrites@MrMakabar sometimes electric providers will have an option called “voluntary green pricing” - essentially an opt-in program where you pay slightly more, but the utility uses that extra money to buy more renewable energy than they would otherwise