Re: I admit, I am Word Processor inept.
You reverse engineer an existing Word document to work out how to use Word!
I would say that this is close to an impossibility, especially using styles as an example.
I've seen Word documents that have dozens of what look like identically names styles, caused by someone tweaking a particular element in a paragraph (like indenting it), which leads to a new modified style being created with the same or a very similar name.
I once spent the best part of a week cleaning up a long, operational document that had been pieced together by cut-and-paste from other documents which had something like 100 different styles in it. All of the source documents were supposed to have been written using the same template, but a lot had had the styles changed in minor ways at the whim of the author. And Word kept the modified styles when doing cut-and-paste!
I'm a real throwback. I did most of my technical writing in the past in troff with memorandum macros, and I used to use SCCS as the change control (and make to control the whole process). I suppose if I was writing more than I do at the moment, I would probably take a similar tack with LaTeX and a modern change control package, although I do find for my purposes Git or Subversion are too complex. As it is, for short documents and letters, I tend to use Libre all the time, because I can pretty much guarantee that it is either already available or can be installed. Such is the advantage of free software.