You may free scared, if you have not played this game ever before. But like all the other best casino games, it's quite easy. You are either a shooter or just a bettor in craps game. Shooter rolls the dice in the beginning of the game.
On this 1st roll, if shooter throws either 7 or 11, they will automatically win and if shooter throws either 2 or 3 or 12, they will lose. And if shooter throws any other number then the game is said to be 'on'.
If you are not shooter and getting on craps you have two choices. Wither you can bet with shooter and you win or lose as the shooter does or you can choose to bet against the shooter. This same rule will be followed to online gambling games also.
Now in the second care you will lose if 7 or 11 come up in first roll or you will lose if 2, 3, or 12 come up in first roll.
It is necessary to understand the game properly before start playing to increase your potential as a good player.