Through CC Apply you will need to submit your application and choose Mission College. From there you will get your student ID number and then be able to register for classes.
You may also be required to take an assessment test, based on the class.
A step by step process is at apply.missioncollege.edu.
After your application has been successfully transmitted via the online application, you will receive email confirmation at the email address that you provide. This process may take 48 hours.
From there you can use your student ID number to log into My Mission Portal and register, pay your bills and see your transcripts.