Knowledge Transfer?!?

I was trying to figure out if there’s a way to natively format emails in gmail into something like of an email campaign template. I don’t want to go thru any web services like mailchimp because lazy ass here, and it’s just for personal use.
Until I came across this “editable” email marketing templates. Wow! I was happy, until I clicked edit and redirected to this page. D4F[]Q! 
I was expecting that it will look like something a drag-and-drop, or at least something like a blog editor. But it’s lines of codes. Owkei, clicked CLOSE!
I marry a programmer for xx years, and I cannot… WHY?!? not even a teeny weeny “Hello World” knowledge transfer.