Do you know about Future Learn? They have many free online classes in English on hundreds of subjects. The website says endless possibilities. The classes are created by people in universities all over. You can search by category for what you are interested in, then check the start date. It seems like they are repeated, so you can take the class another time if this one isn't a good time. You can leave comments on the material and comment on other people's comments, enabling students to learn from each other as well as the online teachers.
There are options to get a certificate or earn a degree that cost money, but you can just take the classes at no cost. The free option to classes allows access for two weeks after the end of the class, so if you get behind, you have an extra two weeks to catch up and finish. It is all at your own pace.
Recently I have taken classes on Ancient Rome and Fairy Tale Literature. Now I am taking an Introduction to Japanese Subculture that is very interesting. Have you ever taken an online class with Future Learn or other organization? How did you like it?