I decided around my freshmen and sophomore year that I wanted to be a novelist or a librarian as my future career, meaning that I have to be an undergrad English major. Writing and reading books have always been a passion/hobby of mine ever since I was little and I just wanted to continue doing what I love for the rest of my life. If you don't know your future career in high school, it's okay. College is the time where you are open to so many possible career paths when you might come in as a Business major but graduate as a Health Science Major. My advice on picking a career is possibly pick a hobby that you enjoy doing and take a lot of pre-req classes as a freshmen in college so you can be open to all the opportunities you have to choose.