If these are works in progress, I don’t think there is going to be any substitution for a design wall (or design floor or whatever space you have). You can google “sampler quilts” for some inspiration, but once you get about half the blocks done, start laying them out and decide what else is needed to fill in the blanks. Here is an example of a sampler quilt I made with pieced star blocks in an Alex Anderson class. Once I had the largest blocks placed, I filled in with appliqué and smaller fillers.