Yes, you can. Keep in mind that graded assignments and exams will overlap and exceptions are not given to students who take more than one course. The weekly time to actively learn the concepts is estimated at 10 - 12 hours per week, so learners taking 2 courses should plan 20-24 hours per week. This is an estimate and many learners report some weeks taking much more time. Learners who successfully complete more than one course at the same time are exceptionally disciplined and motivated.