You’re in high school and are going to do research with a prof? Do what’s most convenient and impactful for you - I don’t think the affiliated college matters. Just my opinion.
You’re way ahead of the curve. You are again, overthinking.
But again, you will need targets and safeties too - which will still be great - but one only need to look at threads like UVA to know - these kids are still not getting in.
In other words, be the best you, and do things because you want to but not to get in.
Having a part time job at Panera may be just as good as research.
Don’t over think - and enjoy your year and in summer you can really start digging in.
You’re a hustler - you’re going to do great no matter what.
Best of luck.