There are a few rules that any new bowler needs know about in order to play the game bowling. The most obvious one to get started is that you must stay behind the foul-line on each shot. Other rules are about how to keep score or the specifications of bowling lanes, pins and bowling balls and not about throwing the ball.
Bowling rules resources
Here are the rules set by the USBC for the sport of bowling and also the rules of the Professional Bowlers Association.
PBA rule book
Professional bowlers follow the rules put out by the Professional Bowlers Association.