Hey now I see the USA are hosting the real game of football, as played by 99% of the world, not your impostor football (sorry Dot), you might even enjoy it (I don't). So Rob will give you a few pointers :-
1/. It's played over two 45 minute sides with a 15 minute break, extra time is awarded for delays, it is not played over 5 hours with multiple stoppages which you're used to.
2/. No one wears armour and only the goalkeeper handles the ball
3/. Heres the bitch, no time for bbq's
4/. You will observe players writhing in agony on the ground, sobbing and crying, don't worry this is normal
5/. Nowadays it is hard to distinguish players as they're all covered in tattoos and look similar
6/. Get someone else to explain the offside rule
7/. Stick to what you know, sports designed for people over 6' 6" and 500 lbs
Any questions ask Monkie, he's the expert