We all (well, most of us anyway) started the same way you did and guess what, we all learned as we went along.
The way to go in my opinion is to attach a workbook with a before and after, different sheets if that suits you, and an explanation in it that explains how you arrived at the answers.
My personal preference is to have everything in one workbook. I usually have a "data" sheet with all info and have the result in another sheet. Mind you, having it in the same sheet off to the side is possible also of course. Other people have different ideas but there are many roads leading to Rome and they all get there.
The gentleman from Post #3 has a world of experience so stick close to what he suggest