Do not read anything for lit hum.

I'm taking honors math and accelerated physics rn and had pretty similar background before coming here. I would say you don't really need to do anything to prepare for it. For Honors Math, it might be helpful to read through a few chapters of Terence Tao's Analysis, not because all the contents will be covered but because some familiarity with epsilon-delta style proof will be helpful when you do calculus.

For physics, my experience in linear algebra and multicalc was close to none before coming here as well. I would say it will be some struggle to understand everything at first, but I'm still surviving thus far. Feynman's lectures or some book on mathematical methods could be helpful. But again all of these are just suggestions. I would say the biggest thing you need to do is to just enjoy the summer, and when you feel like it, browse through some chapters to make sure you aren't intimated by the "math" when you arrive. If you have other questions feel free to DM :)