I earned my first online income through a Dutch travel affiliate site that I build in 2007. Build several based based on the similar concept of promoting hotels in popular vacation destinations.

Around 80% of the traffic was SEO related. I earned money through affiliate marketing commissions. I put my skills into practice by building a website using vanilla HTML and CSS, and in the following years, I launched around 15 additional websites.

Links: http://www.hotels-antalya.nl/, hotelmiracleresort.nl (not available anymore)

They where pretty successful because I manage to rank quickly in the top 3 of high volume keywords in Google with the use of SEO. In the entire period almost reached 100.000 sessions just from SEO traffic.