Document Variables are just another way of storing information in a document. They are a bit like custom document properties, which you could equally use. However you would have to write to them (or edit them) using a macro. The add-in I mentioned uses such a macro, so you can see what is possible.
The add-in was merely an aid to establishing which type of data management you want to use as it addresses all of them and allows you to play around with them.
The users wouldn't need the add-in. To do what you require will require a macro that calls a userform to gather the data you require, from the user and writes it to the storage location you choose. That macro would become part of the document template.
I have attached an example template. Create a new document from it. Save the document and close it, then open the document (you will have to allow the macros if you don't put the template in the User Templates folder).
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Graham Mayor - MS MVP (Word) (2002-2019)
Visit my web site for more programming tips and ready made processes www.gmayor.com
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