All you should know in order to succeed is that your goal is, primarily, to help people find what they're searching for, solve their problems, ease their life and answer their questions.
In this business, people should be your main focus. You can have awesome SEO, be ranked first, if your content doesn't help people, you won't have many conversions.
So the secret to success, in fact, is no secret. It's all about helping people. The more you help people, the more they'll trust you.
And when people trust you and you recommend them good products, they'll buy the products and you'll earn money.
So, money comes when you help people instead on focusing only on money.
Now relax and get yourself a cup of coffee, or whatever helps you relax, you did great.