Blackjack, how to get the advantage?

In blackjack, infinite number of versions exists, enough to confuse even the most experienced player. If you are just beginning to play blackjack, better avoid an unknown version. If you are not sure of how do rules influence the game, you’ll lose for sure.
Learn the basic strategy. That isn’t hard. Is enough to buy a cards deck in the store, or download a simulator game from the internet.
Deliver the cards as if you were the dealer. Look at the basic strategy table, to the bet it recommends in this case. And go ahead.
After a hundred deliveries you’ll be more or less able to orientate in cards, and the basic strategy. Keep on going until you learn it completely.
Then search the blackjack version where you can win more often. In other words, the blackjack version where you can decrease the casino’s advantage.
The good thing in blackjack is that the casino’s advantage isn’t too big, as in other games, often the advantage is on the player’s side. You just have to choose the version right and learn the optimal strategy.
But later about that, meanwhile, go and train yourself.