If you’re interested in learning more about Bitcoin and other cryptos, then this should be a great resource. While this is in the prerequisites for this course, it’s more of an optional asynchronous learning path. You don’t need any of this information in order to complete this course and learn about self-custody, but it will help expand your knowledge.
Beyond Bitcoin and into the Cryptoverse – Binance Academy text based.
Binance Academy – Youtube Series
CoinBureau – Explain Crypto To COMPLETE Beginners – Another youtube series, I admittedly have never watched, but I like the other videos from this channel.