I subscribe to the APQS YouTube Channel. They have several really great tutorials for Free Motion Quilting. I would like to share the ones that they have already and when they upload new ones I will share those with yall as well. These designs range from super simple for the beginner to slightly more "hand-eye coordination" for the intermediate/advanced quilter. Any of the designs would look great on pretty much any quilt.
I like this one too, but would probably do it on a larger scale as I don't like dense quilting too much.