This course is created by The University of Queensland, and one of the authors is from there, Jason Tangen. Another one, Matthew Thompson is from Murdoch University. The third author is Emma MacKenzie, she is also from The University of Queensland.
The authors have a syllabus that is practical enough. They discuss the psychology of everyday thinking using topics like placebo, miracles and paranormal. You can study how people form and change their beliefs, and how to make better decisions.
For this they propose to apply scientific method to evaluate claims, understand evidence and avoid irrational choices. So you can study how to think more independently and more deliberately in a way that you can archive meaningful results.
The course looks promising as a critical thinking course for beginners. It is also a free course and you need to pay only to get a certificate. It takes 12 weeks and you need to spend from two to there hours per week. So your total commitment would be from 24 to 36 hours.