First, not worksheets, but documents.
Keep backups of your Normal.dotm file. That way, if something goes wrong, you can backup to where it was working.
See:
My Addins Download has a number of files that you can download and look at.
- Add-Ins (many, but not all, have macros)
Eventually, you will want to store your macros in one or more different .dotm templates to use as one or more Add-Ins rather than keep them in your Normal.dotm template.
Here is my page about the
Developer Tab and the controls on that tab.
Also, there is a separate forum here available for vba questions.
https://www.msofficeforums.com/word-vba/