Hey I'm not really sure how to play this game. But I guess these forums would be the best way to find out. I'm open to tips!

The best tip I say is to practice alot. Once you start to get use to the physics, you'll understand how joints effect other joints.

Go right to the multiplayer see how other players play and learn from them

You're better off learning how to play in Single Player first and then when you get in Multi Player try and focuses on keeping alive rather than killing your opponent, because the killing techniques come in later but you always need to know how to save yourself.