Hello Mary,
I would start by reading the forums here that talk about things that you are interested in doing. There are regional forums here at permies, where you could post and chat with people in your area. Most people are happy to
answer questions. I have found that when I go into a small town, there are usually people who can connect you with others who are working on projects. I would try the mayor, churches, the granges,
permaculture groups, biodynamic groups or farms nearby, or even attending community events at schools nearby. In rural areas, schools are sometimes the hub of the area, and people will know people who you can talk to. If you are in a suburban area, you could see if there are community gardens nearby. If you talk to a
local government or even a library, they
should be able to point you to resources about helping the community.
John S
PDX OR