Vote with your money, a.k.a. boycott. do not support any product/service that contribute to climate change.

Aim for the level of life of a regular Indian citizen, or even better Bhutanese.

Invest in insulation of your home, learn survivalist skills (how to make a fire, make a shelter, grow food, treat disease, make medicine, etc.) prepare for a scenario where you have to live a nomadic on the go for a while, join a group of similar minded individual.

Or if you have the required kind of budget, follow the step of the ultra rich and buy yourself a piece of land in a remote place (new zealand is hot right now) and build yourself a bunker with enough ressources to live on your own for as long as necessary.

Basically you want to find a way to ride out the collapse of civilization and be equipped to rebuild afterwards.