You will want a website, that is provided for you within Wealthy Affiliate on their top tier hosting. You get this included in your membership. A website is important as it is the foundation for your business (your storefront so to speak). The process is not technical these days so don’t be scared by the idea of “creating a website”. You are going to be just fine.
Products are now put in a category. The commission will be based on the category each product has been placed in whether or not the category is correct. For instance, I had a sale for a child riding toy tractor. Instead of it being in toys category which would have only earned me 3%, it was actually placed in lawn and garden category which I then actually earned 8% instead.
However, like anything else truly worthwhile, apps require a significant investment of your time or money upfront. If you don't have the skills, then you have to hire someone who can assist you in creating a great app. But first you need to come up with an idea that will sell. Do the proper market research and analytics to come up with the right app.