Gillian has shared a list of resources that she compiled after her workshop at our last meeting. There are lots of great ideas here and many of the materials are available free through the Halifax library system.
You might also want to do a search on Improvisational piecing on Pinterest, where I found this Improvisational Piecing board.
If you are interested in a class, Craftsy offers Improvisational Piecing, Modern Design
with Jacquie Gering and other classes that might inspire your free spirit.