I'm in the US on vacation right now and I want to be American and shoot some guns, play base ball, and play USA football.
How do I do this?
Go to a Florida Gators college football game. You can take a bus from Orlando to Gainesville. It would take 2-3 hours probably. They play on Saturday at home. I guarantee you the experience would be a memorable one. The Gators are a huge team, and the atmosphere and stadium would feel like a pro game if you're not aware what college football is like. Plus qts everywhere. You'd have to hurry but it could theoretically arrange it all in a night and day.
Saturday morning so you don't have much time, but if you can make it it's an experience you'll remember forever I know.
Try to look at Craigslist or Stubhub maybe for tickets? Worse comes to worst you could just go up there with no tickets, and try to find a scalper selling some. At the least, you'll be able to do some partying/tailgating with random people if you can't get into the game. Just approach a friendly looking group of students and ask to hang out. They'd be happy party with someone from another country, they'd think that's cool. Plus those SEC girls are Hnnnng.