Maxie, Start with a simple setting. Or, just simply border all the blocks to come out to the same size. Simple comes out really cute too.
Here's an example, Not a fall quilt, All the blocks were 2.5" squares all around the center sq. I just bordered every sq. with a 2.5 in coordinating blue. It will as some point get another pieced border as well.
And, here is another that is just bordered with 2.5" strips with a tiny pinwheel cornerstone. Plain cornerstones look great also. This is yet another quilt that will get another border.
Just trying to give some examples of keeping it simple. And bringing the blocks to all the same size.