Hi Matthew, very interesting thoughts about self sovranti. I made myself the path from: Exchanges - hard wallets - ending up with a linux offline using Electrum wallet. Here an article that I used to accomplish that: https://brutebrothers.com/blog/turn-your-old-laptop-into-a-secure-cold-storage-bitcoin-wallet/

I know, seeing the previous video, that is not somethign that you would reccomend, but I cant tell you, works very well and was the ultimate guide to understand btc address, sign process (off and on chain) fees, UTXO, etc. For those people that follows you and want to learn, check it out.