So, you don't know what you want to do with the rest of your life? Congratulations. You are joining about half the people entering college with you. The truth of the matter, is that when you graduate high school, you're only eighteen years old, you're not supposed to know exactly what you want to do for the next 40+ years of your life, so why are we expected to?
There is so much pressure to have your whole life figured out by the time one graduates high school, but if we're being honest, high school doesn't give you enough information about the world for students to be informed about all of the career options and majors the world has to offer. When you are stuck in a five subject range and only truly informed about a few professions, deciding what you want to be is a lot harder than it seems. I came into college trying to convince myself to go into physical therapy, and now have completely flipped my objectives as I pursue my Bachelor's Degree in writing and my Masters in publishing.
Aside from the small handful of students who have known exactly what they wanted to do from the time they could tell people what they wanted to be when they grew up, most people don't know what they want to pursue for the rest of their life, and that's more than okay! Even if you do come in with a declared major, statistically, that will probably change at least once before you graduate. Don't let other people freak you out. Embracing that you don't know and taking the time to find out is a much better option than forcing yourself into something you don't really love.
With that, it's okay to enter college undecided! Out of all my friends who started college this year, almost all of them did not have a declared major (myself included.) Take this time to take classes to learn about how you learn, and about what you want out of a future career. Get your general education requirements out of the way, take advantage of your advisor, and make the most of the unknown.
The best part of not knowing exactly what you want to do, is that you can explore all that college has to offer. I took classes that ranged from Geology to an oil painting basics course, and although different, all of them showed me things about myself, and what I want in my future career. After I attended and dropped my first chem class, I learned that I am definitely not a science major, and after attending my first writing class, I was reminded that I definitely need a creative career to thrive.
Aside from academically preparing you for your future career, college is also about helping you to learn about and grow into the person that you are. Don't let other people get to you, you will find exactly who you're meant to be here (or whatever path you decide to take after high school, not going to college is okay too.) You will end up exactly where you're meant to be doing exactly what you're meant to be doing, I promise.