These bets are not one roll bets. Hardways also lose on seven. Craps is a confusing, loud, raucous game for a beginner. Don't be intimidated by the complex layout. Try to find a quiet game and a helpful dealer.
Many casinos have classes, usually in the late morning.
Always take at least some odds on the pass line or the don't pass. Always bet increments. Don't press everything to the roof and watch the dealer sweep it all away on a seven out. Equally, don't stand there with minimum across the board when someone is rolling the dice for forty five minutes without sevening out. If you want to scream and high five, do so, but don't scream in the dealer's ear when he's trying to pay you, and don't high five right in his face.