BlackJack is completely masterable in about 3 minutes, you don't need money to learn. All you need is a table like the one found here http://wizardofodds.com/blackjack to tell you exactly what to do for every possible holding for a given dealer face-up card.

Basic strategy is that if dealer is holding a 2-6 and you are holding a 13 or higher, you always stand and let the dealer bust unless you cant possibly bust with 1 card (ie you have a total of 11 or less, or an ace in your hand). If he is holding a 7-10, you basically want to draw until you have at least 16 or 17 or you bust. Double down on all 11's, split all AA's and 88's. The chart tells you to do all that stuff, but if you memorize that little bit, then you won't need to spend extra time consulting the chart for every single hand.