There is no autoresponder included. There are many affordable autoresponder services out there that you can get when you need it, but building an email list definitely should not be the starting point for your business. That will come down the road, typically when your website is getting a sustainable source of traffic. You will be learning all about this as you move through the elite, industry leading training at Wealthy Affiliate.
Shopify is probably the most popular e-commerce solutions provider out there, but because there are so many products and options, newcomers can easily get confused. If you believe your audience has products to sell and could benefit from Shopify’s products and are able to elucidate the benefits of signing up for Shopify, you can definitely earn some big money with their affiliate program.
Amazon has spent years perfecting the art of online selling and you’ll learn a lot about online marketing by observing how they do it. They constantly test different ways of promoting products and have evolved their site quite a lot over the years. See what widgets they use to promote related products, watch how they use reader reviews, and see the way that they describe products.