If you are fortunate, the next four years will be stable. You must educate, organize programs to better material conditions, and bring the proletariat into the left.
Do not betray yourself with “doomer” thoughts, these are a form of liberalism and must be routed out. Despair only perpetuates itself and it is hollow.
You have a feckless neoliberal now in office. Biden will fixate on enriching his donors and once again take his eyes away from the working class. He will expose bourgeoisie electoralism as a fraud incapable of delivering true improvements to the material conditions of the working class.
Do not waste these next years. The left in America has not had this opportunity in almost a hundred years. Seize this moment!
You cannot wait for some ahistorical great man to deliver a new world to you. Those figures only appear so great looking backwards, they reflect the workers they emerged from. All of us have fought alongside stronger comrades than them.
Comrades, this is the calm before climate change crashes down upon you. Unite as leftists and as socialists. Discard your privilege, your chains, your false pride. Seize liberation for all who are oppressed. Build your revolution.
There isn't a one-size-fits-all approach. I was also radicalized by environmental doomerism, but lib friends and family are really put off by it. They don't care if it's true: they want to live their lives without thinking about it. My parents flatly refuse to let me talk about the realities of climate change, poverty, etc because of my "negative worldview".
People are protective of their ignorance and I understand why. I'm way more anxious and depressed for caring, and buying almost anything makes me feel like shit. So I don't really know a positive way to break through the "stop trying to make me feel bad!" response, because bringing them round to my way of thinking is literally going to make them feel bad.
Have you tried focusing on the benefits of socialism instead of the disasters capitalism is causing? E.g., focusing on how great it would be if everyone was guaranteed a roof over their head instead of pushing "homelessness is awful and it's barbaric that the richest country in history tolerates it."