Polo Rules

No forearms contact at all? What does I means? Every time I touh somebody with a forearm that's a foul?

No, it says no forearm checks. So if you push someone with your forearm and gain an advantage, it will be called. Refs aren't going to call you just because you touch someone with a forearm. Advantage should only be restored when one was lost.

Playin ball with the body, so don't right to push the ball away or try to control
It with shoulders or head?

Yeh, don't look to headbutt, palm, shoulder the ball away. It's more about hands and feet though. I doubt shouldering the ball or headbutting it is much control !