"Would you want a big government that looked after you, or a little government that you had to look after?"
That passage from Richard Powell's Pioneer, Go Home in a Reader's Digest Condensed Book collection was probably the first thing which, at age eleven, sitting in a stilt house in Everglades City, awakened my interest in politics and public process. Of course, growing up way back when in the day when Take Back Your Government described how politics worked dates me horribly.
This web link lists vacancies for citizens on Clackamas County boards and committees. If you feel you have something to offer in the process of reviewing the work of government, there are some rewarding opportunities there.