As an individual anything short of some kind of eco-terrorism (not recommended) won’t really have an effect. It’s the collective action of lots of people not eating meat and stuff.

Assuming you’re in the U.S., which state? If it’s in the south I’d highly recommend trying to save up and find a way north. In 25 years some of those states will be literal hell. Better to move on your own terms than be forcibly relocated imo(worst case scenario).

Something i don’t see posted much is to enjoy the present as much as you can. Go on walks. Admire trees/nature. Visit people who live further away. You know, things we wont really get to do in the future. Our futures have been taken, don’t let them take our present too.