Do I have to be an absolute superstar to get into any of the Ivy League?

I would encourage you to be sure that no matter what school you choose (Ivy or not), they have adequate support for students who are first generation, perhaps didn’t have as strong an academic background as private school counterparts etc. My college roommate and I (at an Ivy) both struggled academically trying to catch up on our study and writing skills. We were equally intelligent to our classmates, but hadn’t had the strong academic background. She, in particular, had come from a low income, rural area where most of the kids didn’t finish high school. She was an academic superstar for her area, but unprepared for the rigor of an Ivy League school. Unfortunately, the college did not have much in place to help us. I hope that has changed, but I imagine some schools are better than others. You want to be sure you find a place where you will thrive and be successful - and that may not be an Ivy! Or it may, but just be prepared.