If you want to add a specific section, you first have to make the sections that you want on your site. After that, when you list an item, at the bottom, prior to the pictures, you will be given a bunch of boxes with your sections. Just click on the section you want and will show up!
I have the Cod plan. They give you up to 150 items. Today, I'm going to be switching to the higher plan because I way more than 150. Also, because of the recent changes with Etsy, I want to make sure my site is fully stocked in case I leave Etsy.
All in all, I like Supadupa.