Hi, Maria Victoria,
I agree with what Jacqueline said - your concern is very common and college will likely be a valuable learning experience regardless of the degree you attain.
The simple fact of the matter is that our interests change as we get older. I think it is important to get a degree in a discipline that is applicable broadly. In other words, pursue a program that will enable you to be successful in a variety of career fields. It is terrific that you're thinking about this issue early. I wish I would have been more thoughtful in my approach to determining the field in which I majored. The important thing to remember is that, even if you do start to lose interest in the subject matter that applies most strictly to your degree, you can still pursue opportunities that are more in line with your interests. For example, if you majored in accounting and started working at one of the Big Four Accounting Firms but, after a year or two, felt that your passion was working with non-profit organizations, there are steps you can take to get to that goal. You could try to get on engagements with clients who do a lot of charitable work and find a local organization you are passionate about and begin volunteering for them. As you gain experience and build career capital, you will become a more attractive employee for that nonprofit and, if that organization is familiar with your personality and work ethic through your volunteering efforts, they are more likely to hire you (FYI, this approach is basically the one I am currently pursuing).
Finding your dream job may not happen overnight. Thinking that you will have everything figured out when you graduate college is unrealistic. If you work hard and pursue meaningful activities that interest you, then I think you will figure it out eventually. I linked a career guide below that I think is extremely beneficial. Read one section a day and you will be finished in no time.
Good luck - I hope this helps. Don't hesitate to reach out if you need to.
Jacob recommends the following next steps: