Complex sentence: MacDonald grew up in Cornwall, Ontario where she became active in the local independent rock music scene, putting on shows and creating a fanzine called "Saucy" which gained attention outside of Cornwall as well.
Split into simpler sentences: MacDonald grew up in Cornwall, Ontario, where she became active in the local independent rock music scene. She put on shows and creating a fanzine called "Saucy", which gained attention outside of Cornwall as well.