Well... The starting point of that card is a kind of "There's something rotten in the state of Denmark"-situation, and what the card refers to is the point when that rotten foundation comes tumbling down.
It's a kind of scary card, but the thing is The Tower isn't about ruining good things, only stuff that weren't meant to build on from the start. It's the "You've been living in a lie, but now the veil is lifted from your eyes and the truth becomes clear"-card. It's painful, yes, but it gives you the opportunity to build your life upon the solid foundation of truth.
And oh... THE LINK, almost forgot that...
http://aeclectic.net/tarot/basics/tower.html Great place to find information about ALL the cards, easy to understand, yet not overly simplified and limited!
Ask again if you have more questions - and welcome to the Forum! I bet you will find this is a great place to learn about Tarot. Just browse through the threads, and jump into any discussion - we all learn from each other!
Light and love,
Jenny
PS: The RIGHT meaning, by the way, is YOUR meaning, and no other. Therefore noone here will be able to give you the "one true meaning" of a card. All we can to is help you get started, and after a while you will hear a little click and think "That Jenny, she had got it all WRONG, the Tower means...[insert your own interpretation of the card here]..."! THEN you have the "right" meaning!
Good luck with everything, and do ask any question you like, you will find your own answers in time, don't worry!