Ask a professional in your desired field if you can shadow them for a few hours or days. By following someone around, you'll get a good idea of the daily duties that you can expect if you pursue that career. If all goes well, you'll also have a contact for your job search later on.
College career guidance centers can often help set up a shadowing opportunity for you. Don't be afraid to ask someone directly if you can shadow them. Many people are willing to help those just starting out.