I'm not sure if you're that bad off. If you can only contribute a little, that's still better than resigning and doing nothing. I think every little bit counts. I'm not sure how electricity works in the USA and whether you can buy an inverter and feed the solar energy into mains and help your fridge and AC during the day... I mean concerning ecology, people usually recommend to cut down on consumerism. And make wise choices. I believe that's something almost everyone can participate in. Don't buy a lot of unnecessary cheap plastic stuff on TEMU, buy just as many cars as you need, generally don't buy stuff you don't need. Avoid silly packaging if possible. Prefer products which last. And don't waste stuff. (And a million of other things.)
You seem to be doing quite a few things already. I mean you won't be saving the planet on your own or something like that. But contributing what you can do still is a positive contribution and I think it will have some effect. A small one, yes but that's what one individual can do. I think for a big effect we need some coordinated effort and get politics involved... But that's hard, will take quite some time and any individual again has just a small incluence on politics on a national level.

Edit: Aside from politics, you could also educate other people on a smaller scale, spread the word...