You can change your major, but only if you get excellent grades in this major and get the consent of the department leader, and then other departments agree to let you come. But if you can learn this major well, you don't need to change your major, so it's unrealistic to change your major, and it's common for college students to find jobs after graduation, so there's no need to pay too much attention to this, study hard in college and enrich themselves. The spare time in college is not boring, it is purely personal.