I once did 2 moocs on coursera about machine learning, and I learned a lot, but some time afterwards, they f'ed up their login so much, that they required Google stuff to be loaded, which made me reconsider even logging in there. The platform seemed to get ever more bloated. Maybe I should check what their status is now, whether one can use their site without implicitly agreeing to being tracked by Google.

No idea about whether the courses on there are still any good.