You could use code. Right-click on the Sheet's tab and paste in the following code:
Private Sub Worksheet_SelectionChange(ByVal Target As Range)
If Selection.Address = "$A$1" And Range("A2") = "" Then
You may have to go to Tools->Macro->Security, set the security level to Medium, save the file, close and reopen the file and click Enable Macros. But what it does is if you click A1 (and only A1) and A2 is empty, it select A2. I'm sure there are other ways to do the same thing, but I can't think of a way without code.