if you want to go down the rabbit hole others have built tools and Schneier's Solitaire encryption scheme https://github.com/atoponce/deckware https://crypto.stackexchange.com/questions/70386/can-a-deck-of-cards-be-used-as-a-practical-source-of-cryptographic-randomness https://www.itsahlive.com/...

Raw entropy cards beat dice. Action for action it isn’t close, 52 cards gives 225 bits where 52 dice rolls gives 134 bits of entropy.