I don't want to shower you with dos and donts, but keep in mind that in Canada and in ASC (this forum) we are strict with the age limit and verification. It is not only for your safety, but for others as well - along with the longevity of the sport.
If your host family (guardians) wish for you to play, they will most likely need to sign a consent form. Having been a host family before to many from Japan and Korea, do note that it is up to their judgement and as such, their responsibility.
I suggest first being a spectator at a game and meeting the people local to you before anything else - you never know, maybe the game here is played differently and not up to your standards or style.
"It is better to be hated for something you do, then to be hated for something you don't do".