Can I take more than one online course at a time?

It is possible to take more than one course at a time. If they have webinars on the same night, you can alternate which one you attend live, and later watch the webinar recording for the other course. Otherwise, coursework is conducted on your own time, so you would just have to be especially conscious to budget enough time in your week to do the readings, participate in discussions and complete homework assignments for multiple courses each week.