Creating CV and accompanied document

I am interested in creating my own CV and not picking up a ready-made from the thousands that exist online.
Since I am a beginner I was wondering how to do that: mainly, what are the basic steps and what I have to look for.

Although google would be enough to answer the previous question, the reason that I am posing it here is that I want, along with the CV "style/layout/what-ever-it’s-called", to create an article type of document (e.g. Statement of interest). This document I suppose it shouldn’t be in the same class as the CV but I want it to have the same "style/layout/what-ever-it’s-called". This would include same margins/fonts/sizes/header of sections/etc such that it is clear to the reader that these documents are neat and uniform and come from the same applicant.

Is there a "clean" way to do that?