Business is large topic and range of study.
Accounting, Operations Management, Logistics, Information Systems, Marketing, Research & Development, Industrial Engineering, Finance, Human Resources, Enterprise Management, International Business, Entrepreneurship, Law & Ethics, Economics, and many more areas of study are what constitute "business".
As Freddels said, talk to people in the fields you would like to pursue. Also get to know the individual disciplines within business. A school that is good for accounting may not be good for marketing.
Explore. You're young, and that is what you should do. You may find that business is not for you, and that is OK. You may find that it is for you, and that's OK too. What's not OK is pursuing a field with no idea what it entails or what the outcome will be.
But in the end, successful business people are created in the marketplace, not the classroom.