brash on Nostr: It can be as complex/simple as you'd like. You could use a bip39 12 word seed with a ...

It can be as complex/simple as you'd like. You could use a bip39 12 word seed with a blank passphrase (13th 'word'), and store thise in your head. But imo you should always add a 13/25th passphrase to make it harder to take your coins if someone stumbles on your 12 words. See this...

https://www.blockplate.com/blogs/blockplate/list-of-bip39-wallets-mnemonic-seed