I spend about min an hour a day. The general timeline is about 4 hrs per lectures, reading 1 hr reading (mostly optional) and 3 hrs per assignment. I take longer time on assignment since I am new. Sometimes I have to watch lectures over and over again to understand. In general I spend about 10 hrs/week.
I don't think there is any value in paying for the certification, since its an introductory course.
I don't think there is any value in paying for the certification, since its an introductory course.