I would suggest that you use a pattern that is very simple. One that I want to try using corderoy looks like a cathedral window but so much easier. For each block you cut two circles, one front, one back, then a square of batting to fit inside the circle. If you use a flannel for the backing, you could do without the batting square since it will be warm enough with the flannel. Sew around the circle, right sides together. Cut a slit in the fabric that will be the center fabric and turn right side to. Fold the edges so that you have a square with the round edges making a cathedral window "border" toward the center of the feature fabric, hiding the slit in the fold. I know that these directions are sketchy. But you get the idea. Sew the blocks together in rows along the fold line.