I finished the Python 3 Course at SoloLearn!
After weeks of intense problem-solving and coding, I've received my long sought-after certificate.
I highly recommend SoloLearn.com. The course is not video-based, but text-based, which ensures you stay focused. At the end of each little section, there are coding problems to solve and you cannot proceed until you get the correct answer. This really almost forces you to understand each topic before moving on. Much better than the equivalent course at CodeAcademy, although I do prefer some of their other courses.