Unfortunately online pedigrees connecting American Shirleys to the ancient Shirley family of Ettington England is untrue. No connection. Many of the early Florida Shirleys originated out of Georgia Branch 22 here
I don't know if your family is linked to this branch, but take a look and see. You can email for further help if you need (see the contact link on any Shirley Association webpage).
If you want to participate in the Shirley Association DNA program, then you need to do so via FTDNA, not ancestry. Also, these tests are for MALES who have the SHIRLEY surname only. All other tests don't trace your Shirley ancestry (waste of money therefore).
Hope that helps