'What can I realistically do about climate change?'

I was born in 1988, which apparently makes me an older millennial. My question is, what changes can I make and realistically recommend to contribute to fighting climate change? I already vote conscientiously, I’ve moved closer to my office – reducing my commute. I can’t afford a new electric car, I don’t own my own home where I can install solar panels. I’m largely vegetarian. I recycle and compost dutifully.