I'm British but did about 50/50 of my education in the UK and the US.
Loads of my friends drove by age 16 and the parking lots at school had some very high end cars which were parked alongside some very clapped out old bangers, lol. I didn't have one as I wasn't there at 16, but was back by age 18 for uni and had a car from about 20, mine was somewhere between high end and clapped out, lol
For my drivers licence I had to parallel park, but the poles had to be massively wide apart to account for those taking their tests in Cadillacs, ha ha. I then drove about 100yds forward, emergency stop and then about the same in reverse. I studied for the Highway Code as I'd had to for my UK licence, I got 100% on the test and they announced it over the tannoy as that was so unusual, I nearly died of embarrassment!
I wasn't expected to pledge the allegiance, but was expected to show respect when others did. They once played God Save the Queen at a sports event just for me and everyone cheered at the end, I thought that was very sweet of them.
I loved my time in the US, the country has its issues but I hate the attitude some people over here have towards it, the people are in general really lovely and intelligent, just like the majority of people I know here.