This is a very basic primer.
I think the main sticking point for newcomers is the downs system. You basically have four attempts to progress the ball a collective 10 yards. If you achieve that, you get another four goes from the spot the ball ended up. If you don’t, the other team takes possession.
So you start with 1st and 10 (the first of four downs, with ten yards left to get). Say the QB hands the ball to a running back who runs four yards. You now have 2nd and 6 (the second attempt with six yards left to get). And so on.
Given that it’s bad to hand the ball to the other team, if you don’t do it on your third attempt, on the fourth attempt a team will either punt it away, attempt a field goal if in range, or sometimes just go for it.
A field goal is three points. A touchdown is six points. You usually kick an extra point for one point after a TD, but you can also attempt to score again from the two-yard line for two points.
Teams are made up of 53 players, split between offence, defence, and special teams players like kickers and punters (and others drawn from the offence and defence).
Offence consists of the quarterback who throws the ball or hands it to a runner (or runs themselves). They have an offensive line in front of them (a centre, two guards and two tackles) who protect the QB but can’t handle the ball themselves. Running backs run with the ball (but can catch it too). Wide receivers will run down the field to catch passes. Tight ends can block like the offensive line, but also receive passes.
On the defence, you have a defensive live who try and squash the QB or tackle runners before they go anywhere. Linebackers who do a bit of everything. And safeties and cornerbacks who follow opposing receivers to stop them catching the ball and try to intercept it.
Four 15 minute quarters.
The Super Bowl should be very good. The Eagles are a very complete team with a good defence and an exciting offence featuring a great young QB called Jalen Hurts who’s very good as a runner, and a top receiver in AJ Brown.
The Chiefs have Patrick Mahomes at QB, who at the age of 27 is already regarded as one of the greatest players to ever do it. They also have tight end Travis Kelce who is an absolute machine.
That’s about the long and short of it. Feel free to ask anything else, there are a million nuances but this should help you bluff your way through!