If you want to do Affiliate Marketing, you have two options, one, join an affiliate network and start promoting products from this program, for example, you can join Amazon or Clickbank and start promoting the products. Two, you can join an affiliate program for businesses and make money by driving sales. For instance, you can earn from Fiverr affiliate, Webull affiliate, etc. In my opinion, the second option is more lucrative then the first one if you know how to market.