Poker is a game of patience, so make time and play untill the end.
The same thing applies to tourneys. It is a shem to quit when you are in the lead or already playing for money. The duration of a tournament depends on the blind structure and starting stacks.
There are : slow, fast and turbo tourneys, also Freezout and Rebuy.
Don't quit after your first try! Only by playing can you experience all that Poker brings. The more you play the more you learn. In Poker with knowledge comes luck! You will learn the rules quickly but you will master the game your entire life!