Not fully. ...my lack of knowledge is ... challenging haha.…

You'll get there, been trying to figure out paper cold storage wallets since day dot.
Now just add brc100 so you never get the money button debacle ever again.
Still have numerous gifts / tokens like zcash beta testing tokens a shit tonne of them in my old moneybutton. That i was gifted from the kind folk on powping, damn those were the days. Powping was bonkers.
And still waiting for someone to disprove brc100. Until then onward and upward. But as i said once Treechat is brc100 .why would one stuff around reinventing the wheel.
Awsome beyond awsome you found the brainwallet article, one of his best, needs preservation.
Ok better quit before i self destruct.ok bye.