A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
If you want to change the blank new workbook that is opened when you start Excel or press Ctrl+N, modify the blank workbook to suit your needs, then save it as a Microsoft Excel template named Book.xltx (this name is obligatory) in your Excel startup folder. By default, that is
C:\Users<username>\AppData\Roaming\Microsoft\Excel\XLSTART
AppData is a hidden folder, so you must show hidden files, folders and drives in Windows Explorer to see it.
Also create a version of the workbook with just one worksheet, and save it as a template named Sheet.xltx in the same folder.
It will then be used when you insert a new sheet into an existing workbook.