Free Online Class Focused on the Technical Side of Bitcoin and Cryptocurrency
If you have any technical skill and are interested in learning how Bitcoin and other cryptocurrencies work, Princeton University's free MOOC that focus on the technical side of this space is a great place to start.
You can choose to pay for a certificate or audit the course for free. Class starts this week.
https://www.coursera.org/learn/cryptocurrency
Each week has up to an hour and a half worth of video among other content, links. and resources. While this course won't have you becoming a professional blockchain developer in the next 11 weeks, it will get you a much better grasp on the technical side of crypto than most people in this space have.