There are lots of "how to" web sites for Community Organizing. I'd just skim through a few of those - assuming your unfamiliar - then try to find real, involved local people who are already involved:

- If you have a good local politician who'd likely support this (probably from already being a supporter of affected groups), you could ask them.

- If your area has even half-decent services for the homeless, or a church serving meals to the needy, or a Salvation Army, or etc., then the people you want to talk to are within 2 or 3 degrees of separation from those. Or if your local transit org has in-person monthly public meetings, you could attend one of those & ask around.

Yes, I'm biased toward established, old-fashioned groups, which are already doing stuff in your area. They're the ones with the accumulated experience, local knowledge, and track record. Vs. (say) AI phobics are more like Level 0 NPC's, with default-to-zero skills or experience getting along in a group.