I’ll let others answer familiar - but if I’m reading this correctly, because you have more than 4 APs at 5, you won’t need an SAT. That’s at least how I read it.
Others will talk to you about Oxford and the experience because what I’ve read of on here, it’s very different…it’s not a similar educational experience to here.
So I’m sure tomorrow, you’ll get all sorts of good info from people.
Best of luck.