When money is attached to an educational experience, the person parting with the cash will undoubtedly try to focus more on saving rather than learning valuable skills that will make them double or triple their initial investment.
The best way to actually learn how to play blackjack and find out about the rules and terminology is to have a few free plays or practice runs. When the games are free, then players do not have anything to lose.
The games are more likely to go slowly and explain everything in detail for everyone to understand.