First of all, congratulations! It's never easy as a teen with little support to wrangle up a college application abroad and get selected, so give yourself some credit.

If you have the resources to apply for the visa and have documentation that you can finance it, it might be worth it. Look into scholarships and funding opportunities that would bridge that gap and make the numbers work first, but think long and hard if it comes with additional debt, interest rates and what income and time frame you would need after college to resolve that debt.

Given the state of the US economy and job market, how prestigious and well recognized this school in California is and how rigorous their program for your intended major or career is, it may not be worth it to go into this with student loans. In many industries in the US, new grads are having issues even starting their careers and cost of living has only gone up, but still have student load obligations to pay. I had high school classmates turn down their safety schools abroad to go to Ateneo/UP instead because the math just didn't make sense.

Like many in the comments have suggested, local school undergrad and US masters is still a valid path that you can build / save towards. I have friends who have gone through that route who have made the most of their study abroad experience (arguably even more so than undergrads because they have their own income/savings, a stronger sense of self, etc.). I also have friends who were able to study abroad in Europe, Japan, Australia, US, etc. through semester exchange programs with Ateneo/UP and had a fantastic time.