For the purpose of applying to universities, and for most other purposes, being a permanent resident is the same as being a US citizen.
Your GPA is great, so far.
1480 is very good for the PSAT.
You already have very strong ECs.
At this point I have perhaps three recommendations.
First of all, be you. Do not try to be whatever you think Princeton or any other school is looking for. Be yourself. As part of this, you might want to read the “applying sideways” blog on the MIT admissions web site. As I understand it the blog recommends that you do what is right for you and do it very well. This approach has worked very well for my family. However, what I did, what my wife did, and what our daughters did or are doing, are entirely different things.
Secondly, be a bit careful about trying to do too much. Understand what pace is right for you, and stick with it.
When it is time to apply to universities, keep and open mind, keep your budget in mind, and make sure that you apply to at least two solid safeties.
And yes, I agree with @tsbna44, you are doing very well.