Permit me a PSA about local politics: engaging in national politics is bleak and dispiriting, like being a gnat bouncing off the glass plate window of a skyscraper. Local politics is, by contrast, extremely responsive. I've gotten things done --- including a law passed --- in my spare time and at practically no expense (drastically unlike national politics).
An amazing thing about local politics, at least in a lot of places, is that they revolve around message boards. The boards won't be in places you want to be (in particular: a lot of them are Facebook Groups) and you just have to suck it up. But if you enjoy participating in a community like HN, you can participate in politics, too, and message-board your way towards making things happen.