I love your quilt. we must have lots in common since I have some of the same prints in my stash...and nine patch is my favourite. Since you are new to quilting, I might crosshatch this one. It would allow you to use your walking foot, and not be so overwhelming. It’s not really easy to use the walking foot on curves, but can be done if they are simple curves. So if you are convinced you need to do curves, how about a orange peel type curve. Or... for a different look, huge overlapping circles
check out petitdesignco...30 days of walking foot quilting, there are some great ideas here