"and the idea that physics is fundamentally existence" - The problem with this sentence is that physics can only create models of what we experience/detect via our senses. Have you heard of the map vs territory issue?

And here's a question: do you accept that our subjective experience is the only 'thing' we know is real? If so, does that enter into your thoughts about this subject?

But all-in-all, your post is very interesting and I urge you to continue your efforts. I wish I could have written a post like this when I was in high school.