This is a very general question. Many people may find that it's too big of a question to tackle. But in my personal experience, making money is actually not extraordinarily difficult. I've found it comes down to this simple equation:
1. Find yourself a product or service you can sell for at least 50% profit
2. Find yourself a platform to sell it on (whether it be ebay, amazon, craigslist, Google, paid ads, etc)
3. Put up an ad, test, test, test, and make your first sale.
4. Rinse, wash, repeat.
Basically as long as you have some sort of system that follows these guidelines, you can easily achieve results and make your first money online. Simplifying it like this I think will help people see just how over complicated some people make this process out to be.