Have your thought to create some course and show it to the world? Of course you can create video and post it on the Youtube but how about to do it more sophisticated and improve quality of course?
You can use online platforms to host courses with extra functionalities like tests, analytics etc. or you can host on your own Open Source edX. I created short presentation in which I walk through deploying edX platform on virtual server (in this case Google Cloud Platform). With few clicks and almost no IT experience you can have running server. It can be used for individual, university or company to provide training for it's employees.