How many embroidered squares do you have?
Are you planning to use sashing or alternate squares between them?
Do you have a particular finished size in mind for this top?
Will you need more embroidered squares to get the size you need? Are you willing to not use some of them?
Do all these embroidered squares have the same background fabric?
For now - maybe laying them out somewhere - (on a bed, on the floor, on a design wall - whatever you have) - will help you decide what to do next. Also - if you can - take pictures of your layouts so that you can remember what each one looked like.