Affiliate Marketing Secrets

There are people that make money with amazon while others dont.
thank you!

I’ve learning web development but what I really wanted was a server side programmer. What programming languages is the best to learn for this kind of niche?

I am currently in university studying environmental science Bsc (Hons) and want to go into teaching afterwards. I was wondering if their was a niche market of environmental science teachers or if the subject was split up between the main three sciences.