Udemy
On Udemy, you can find a huge number of courses of all kinds, at all levels — and to be honest, of all qualities. Fortunately, it’s possible to get a refund if you haven’t purchased the course too long ago and if you haven’t completed too many lessons.
So here’s a tip: quickly watch two or three lessons to get an idea.
Also, pay attention to the ratings, but also to the course duration — if one course is 42 hours long and another is only 3 hours on the same topic, it’s worth asking yourself why.
What I like is that you can find courses on almost anything: science, computer science, drawing, languages, and more.
Don’t be put off by the prices — there are regular promotions (about once a month) during which courses are sold for 13, 14, or 17 CAD. So be patient.
I’m a heavy user of these courses. The mobile app on Android didn’t really convince me, but every day I spend at least 20 minutes following one course or another.