The shortest way between 2 points is a Straight Line! Stop writing novels.
I have seen proof, and done a lot of testing over the years. Honestly, write your own email. Keep it short... most people are not going to read a novel.
Write like a real person, connect with your reader, give them a solution to a problem.
Your headline/subject is to get them to open the email, the body is to move them to your product or website. That is it... let the Website, sales page, offer, do the talking.
Often a simple intriguing question is all that's needed...and a link to click for the answer. It works, I've used it in my own affiliate marketing for years.
Your Postscript if desired.
Yours in Success,