A family of Microsoft word processing software products for creating web, email, and print documents.
Reformatting a document may involve a lot of manual "intervention," as you have noticed. I'd still set up the styles properly and then (re-)apply them to text paragraphs as needed (but I understand that you hesitate to do so in a short document).
Indentation (on the left side of paragraphs) is especially tricky with numbered styles, because you have to set it up in the multilevel list dialog box; you can't reliably do it in the Paragraph dialog.