Everybody starts with two cards in black jack, including the dealer. Black Jack Rules are quite easy to learn, since are not a whole lot of them. The general rules for requesting cars is to sweep your hand, palm down, towards you once or twice. This signals to the dealer that you want a hit or a card. If you don't want a card you simply wave your hand across you cards with the palm facing downwards, this tells the dealer you will stay with what you have.
Words can be misunderstood, hand signals are more precise.
Often the down card is used to signal for a card in the same way the hand is used. The card is swept forward for each hit, don't bend it or the dealer will yell at you, when a player has had enough cards the signal card is slipped under the face up cards. The Dealer controls the game, makes change, deals the cards and pays the players or collects the bets. He should be efficient and reasonably cordial to the players, that's not always the case, but mostly it is. The Black Jack table is built with room for seven players who sit in the front of the dealer on high stools.