If you can't convince me, a relatively rational person who firmly believes in anthropogenic climate change and the need to take action against it, to curtail my personal carbon emissions, then what hope do you have of making any difference through your example?
Imagine two more worlds: one where everybody but me thinks the way you do, and one where I think the way you do but everybody else thinks the way I do. My argument is that those worlds will also materially differ, but in this case the "good" one is the one where I don't do anything.
You need to show me that changing my own personal habits will somehow noticeably push the world toward one of the "good" ones. All you've offered so far is a bunch of wishful thinking about how if everybody thought this way, it would be better. It's true, but changing my habits doesn't do anything to change other people's minds.
It is a bit like war, except that we don't have an army. There's an implacable enemy out there, and there's no organized resistance. You're telling me that I ought to pick up a gun and go fight. I'm saying that this would be silly, I'll just be instantly killed by the enemy without making a dent in threat they pose. Instead of convincing individuals to individually grab guns and charge the enemy, we need to raise an army. We need to get everyone together and act collectively.
You don't raise an army by going around criticizing people for not fighting the enemy. You need to create an organization, you need hierarchy and structure and doctrine and funding and a mandate from people with power, and only then can you productively go around telling people they ought to join up to fight the enemy.