Oh no! Is the issue not knowing how to play Blackjack or is there something difficult about the game itself?
One tip that I didn't include in the in-game instructions: you can abuse the save mechanic + the "reshuffle" mechanic to pretty much get whatever outcome you want...
Blackjack is actually pretty simple. The goal is to get as close to 21 as possible without going over 21. Face cards are 10, Aces can be either 1 or 11. You start with 2 cards, and can accept another card until you choose to decline.