While you are welcome to bring your own ecommerce shopping platform, we invite you to try the ones that we have available here. Try the Demos (these are not videos, but actually demos to use) and see what fits your needs.
'The Favorite' has been the primary site builder and ecommerce platform for many years. The shopping cart is 'offsite' with Mal's Ecommerce. This is the most basic and simple for beginners and advanced alike. There are many templates to choose from, or have a designer make one reasonably for you. There is no code knowledge needed.
Drag N Drop
The Drag'N'Drop builder is simple with many templates that can be customized as you like. The shopping cart is built in, so visitors don't leave the site. You don't need to know any 'code', just drag and drop. This is a great choice for beginners and advanced users.