The Copyright Alliance is well worth joining. It brings creators together to support one another, so authors try to help out musicians, or photographers, or film makers, and so forth. From time to time, there is a bill in Congress that they ask copyright enthusiasts to support by topping and tailing a pre-written form letter.
Today, there is the American Music Fairness Act (AMFA) House Resolution 4130.
America is one of the very few countries in the world that allows radio stations to play music without paying the song writers and copyright owners of the music.
One of many topics is "Basics Of Fair Use"!
All the best,