I know nothing about LibreOffice macros but would be amazed if there is any way to "convert" Word vba. The programs have different structures and methods.


I don't know about "future-proofing." Libre Office also changes.
Most macros that work in Word 2003 work in the latest desktop versions of Word. I still use some that were written in 1997 for Word 97.
And, yes, as you asked before, Word 2003 will run in Windows 11.