You will need to complete a form to request the break, and speak to your academic advisor about your plans to continue. Please see Holiday Semester / Suspending your Studies for complete information on how to request a break.
You can speak to your academic advisor for advice. When you have decided to change programs, reapply for the program you want to change to through the online applications portal. Please also see Change of Study Program for more information.
You will need to complete a form to request the end of the study contract, for detailed information please check Withdrawal from the university.