This is by no means an exhaustive list. This is just a link of things I found useful to me along the way...
Bitcoin 101 - Quindecillions & The Amazing Math Of Bitcoin's Private Keys
Blockchain 101 - A Visual Demo
Lightning Network, Explained
Understanding Bitcoin - A Beginner's Guide (With Help from Wikipedia)
Bitcoin Beginner Playlist
Bitcoin 101 [Video] Blackboard Series
The Internet of Money
- by Andreas Antonopoulos
Bitcoin Mastermind Discussion w/ Charlie Lee and Tuur Demeester
any video or article by Andreas Antonopoulos
How to securely create a bitcoin paper wallet
Download and use this to generate a paper wallet with a Segwit address
That's not Bitcoin! This is Bitcoin!
This is Bitcoin. Who are you to tell us otherwise?
More Advanced Stuff
Subscribe to Jimmy Song's
Bitcoin Tech Talk
Learn Bitcoin from the Command Line
- (book) by Andreas Antonopoulos
Breaking Down Bitcoin
Bitcoin and Cryptocurrency Technologies
- a free online course created by Princeton University
The Great Bitcoin "Bubble"