I have collected many resources (courses, most of them are online and free) from colleges, universities, academies to online books.
See here: Available courses on Bitcoin and Blockchain Technology from colleges and Universities
Origninally, I made that thread for courses from colleges/ universities, but later I expanded to other sources.
Note that one can visit following sites:

• https://www.edx.org/learn
• https://www.coursera.org

Then use keywords: blockchain, bitcoin to search for all available courses (maybe some of them are not listed in my thread).
There are helpful videos too. One can start with 33 videos for Beginners, then move further with other playlists on that channel.
In case you see interesting courses that have not yet listed in my thread, please let me know.