I see a lot of people go to school just for the sake of going to school. They constantly change their major and take way more than 4 years to graduate. After they do graduate, they have a degree that does nothing to help their career.
School can be very expensive and it's important to know your passions, or at least have an idea of them, before you start school. That way, you can get the education that helps you be successful.
Speaking from personal experience, education is only one part of the formula that helps you get a job. It's a big part, but you can still get a good job even though the education was from a different area then where you're trying to work.
You should develop a good work ethic, a network of friends in the field that you want to work in and take the time to understand the skills required to be successful in that field. If you don't already posses those skills, then start to develop them either through formal education or other means.
If you're unsure what skills are required, i recommend browsing for job postings in that career field and see what skills are required. Once you know that you can work to develop them.