Short of running for office, I just don’t really feel that my actions can affect anything. I will choose green options when available, I pay for an energy supplier that claims to be 100% renewable powered, I don’t have a car, I haven’t flown in years, I eat mostly vegetarian, but at the end of the day all this really does is slightly assuage my guilty conscience.
I’m not convinced activism is much more effective - everyone hates extinction rebellion every time they block a highway and politicians get points for saying they’ll stop it happening again. It really feels like the only real way a single person can make a difference is by running for office, and I would be a terrible politician.