And how much does it cost?

I havent played it before, but is the full game out yet? can i buy it?

You can't buy it. Wait until an open-beta signup weekend or something and make an account. Downloading the game is free until the full game comes out, then it's like 20$.

You can prepurchase. Idk if it gets you into the beta. I'm bored right now cus the servers are like down

You can NOT pre-purchase the game if you do not already possess a beta account. When you do, you can pre-purchase the game at the cost of 30$(U.S). This, if they have not changed it, will give you 3beta-keys to send to your friends as well as in-game cosmetic bonuses until release.

Full game / pre-purchase is actually, $30