Typically Shopify is used for Dropshipping or Ecommerce, as it is a leading platform. Having said that there is no reason you can’t add in affiliate marketing to shopify – there’s nothing stopping you adding links that are affiliate to your shopify website. Indeed, Shopify has apps that are specifically based around adding Affiliate Links. As shopify is a fairly easy to use ecommerce platform, this could be a viable beginner option.