I earned my first dollar online through posting videos of my doing my hobbies online in youtube. But it's really a long and hard process. You really need to exert extra effort on thinking of a content, making it, recording it, editing it, posting it, letting people know that your video exist through the use of social media and getting to view and like your videos. After a couple of months, i earned my first dollar at youtube and i was very happy seing that number at my revenue page. It inspired me to do more, to be better and try harder everytime. Yes i have other means of earning money online but they only pay in cents so, yeah, youtube is how i earned my first dollar online.