The difficulty is not particularly great! Need some funds and achievements! But if you want to change your major! I suggest you ask the counselor and teacher of the corresponding major when you enter school! When entering the school, there will be responsible persons in all majors to receive new students! Ask them what procedures they need to go through and when they can transfer! You'd better finish your freshman year! Because by freshman and sophomore, all the professional courses will be finished! It takes time to change majors! Professional courses may not keep up! This is just a suggestion, but also depends on the individual!