Affiliate marketing generally requires you to have a very good skill before you can make something tangible. A lot of people who venture into affiliate marketing actually do not know how to promote their product effectively and they will give up and say it is too hard.
some of the basic skills you need to acquire if you really want to become very successful in affiliate marketing and internet marketing generally are;
Content creation: Content creation is one of the best skills you must master if you really want to become successful affiliate marketing. A lot of people who are trying to venture into affiliate marketing do not have the skill and they probably do not make money on affiliate marketing. If you have a blog then you must learn how to create content that would persuade people to purchase whatever you are promoting and if you are using YouTube you also need to create good content that would attract people's attention.
SEO: Search engine optimisation is a must for anyone who is running a blog for affiliate marketing. It helps you to know what people are searching for and in that case, you'll be able to write an article that will get a lot of visits.