Best of luck!
Hey Amy! This is a great question and one that current college students ask themselves all the time. Ultimately, your major should be something you are passionate about and one that can teach you transferable skills. By "transferable" I mean skills that you could use in different occupations whether that be research, public speaking/presenting, analyzing data, etc. Typically, universities do not make it hard to switch majors but you have to make sure that you can indeed graduate on time. This means that if you switch to a completely different major, that you can finish all the required courses in time. To answer your question more directly, it is not hard but can be costly if you don't plan ahead!