I think you are missing Andrew's point about who is completing the document. If you are sending out the from for others to complete it is better to try and avoid macros. Content controls are better for that as you cannot force users to run macros. To that end
https://www.gmayor.com/insert_content_control_addin.htm makes the insertion of content controls, and mapped content controls a simple task.
If you are filling in the form yourself (or someone in your company is tasked with that) then macros can more readily be used and to that end you might consider a userform to collect the data which can be written to bookmarks, variables or again and perhaps best of all content controls.
Greg's site, referred to by Andrew, has a lot of information on Content Controls and how to manipulate them. Greg has been a good friend for more years than I care to think about, and he will not mind me saying that his add-ins tend to be for the power user, who understands what it is they do. He cannot resist the intellectual challenge of stretching what they are capable of. Mine are aimed more at the lay end user where such understanding is less necessary nor desirable.