Sarah I cannot FMQ even after years of trying. What I do is I guess, like top stitching. I draw a chalk line and stitch on it. For example, your center orange square: I'd trace the sides of an old CD to make 1/2 circles from corner to corner and just sew on the lines. It would add movement to a basic square pattern. In the larger areas, I traced plates, heart shapes, diamonds; you name it. Then I just sew on the lines.
I'll try to attach an example of my version of FMQ: