I'm going to talk about a project that our teacher gave us this semester.
This website has many courses and if you open the webpage and click on explore courses there are many topics and you can choose the one which is your favorite.
As you can see they are sorting by starting soon or newest courses.
But you should pay attention to course start day, when it will be finished and how long it takes.
And it only requires your email and after you sign up you can start and learn about an article or wait for it until it gets start. You can download video lectures to know about topic which teachers will tell you about it.You can participate in discussion forums and take part in quizzes and exams too.
As you will know more about your chosen topic, you can enjoy your time.
For me, the more I know the less I understand about this amazing world.
Just Go for it