As an online marketer, you would probably want to work according to your own schedule. And you would also want to work anywhere you want. Of course you also want to have financial independence from online marketing.
You will need to join at least an affiliate program before you can make money. To this end you will also need to find a niche market and promote the products of that market. You will then need to create a website to promote the product. For the contents of the site, you can write about fifteen articles related to the niche market. Build up some links to your articles. Then you should check for the number of visitors to each article everyday to see if there is real traffic.