Sure it's good to minimize energy use as you outline. But where does it leave you in terms of tonnes of CO2/year?

AFAIK the Paris accord goals (inadequate as they are) imply a target of around 1500 kg of CO2 per capita yearly. Homeless people achieve that in the west. You won't get near those levels, hower much you try to reduce your personal consumption.

We're not going to individual-responsibility our way out of this, and I wonder if getting people to try will just give them a false sense of accomplishment.