I need to graduate
In order to graduate, the first step is to apply to graduate.
You'll find information about the forms, fees and deadlines for both bachelor and master's degrees on the Apply to Graduate section of the Office of the Registrar's website.
Next, you'll also want to attend Grad Fest.
At Grad Fest, you can purchase your cap and gown, have your graduation portrait taken, check to ensure the correct spelling of your name on your diploma, etc.
After you've taken care of that, you can think about the Commencement Ceremony.
The Commencement website has detals about getting tickets, where to park, and other information pertaining to the big day itself.