If you had saved AutoText, Macros, Styles, Keyboard shortcuts, or other customizations in your old Normal.dotm file, write back here, in a separate question, about how to transfer those to the new Normal.dotm.
If you did not have such customizations, you have been ignoring some of Word's basic features. They make using Word much easier

• Normal Template (Templates in Microsoft Word - one of the Tutorials in the Intermediate Users Guide to Microsoft Word)
• Moving (Sharing) Customizations in Microsoft Word
• AutoText
• The Importance of Styles in Microsoft Word
• Assigning Keyboard Shortcuts in Microsoft Word 2007-2024 (365) - Microsoft Community