Just as was said: Practice a lot.
Have fun. Don't take it seriously.
Keep it cute. And if anyone crosses you with unnecessary personal attacks and attitude for no known reason, stick up for yourself.
Respect = Respect
Good luck and have fun!
But really, don't let people intimidate you or punk you out. As many as there are great people there are those psychopaths who will treat you as if you're below them in a video game. It may not happen to you but be prepared and don't let such a thing discourage you. Be yourself. The competitive scene in any community can be harsh. Look out for yourself and I may advise you go with a friend.