1(d). Learn something traditional, and teach it to your friends

Note. THE OPTION THAT NEVER WAITS ON ANYBODY, AND IT HAS A SECOND HALF. Learning a traditional song, dance, poem or story needs a good source rather than access to the community, so it stays open whichever three groups you chose. But you must also TEACH it to a group of your friends, and that is not a footnote: it means understanding the thing well enough to explain it, and getting people in a room. Recordings, published collections and a local library will all serve as sources, and a person from the group is better than any of them if you have one.