Skip university. In the exclusive edition, University is replaced by Scuola del Pizza . It costs $5,000 and takes 2 years. Graduating with honors unlocks the Stainless Steel Spatula (a legendary item that doubles your cooking speed).
While you can be a pizzaiolo anywhere, the exclusive edition only triggers if your character is born in Naples, Italy (the birthplace of pizza). If you pick "USA," you only get the generic "Dominos Manager" job, which is not the same. the pizza edition bitlife exclusive
If you possess an older Android APK version (specifically BitLife v3.12.4 - "The Carb Load Update") that you saved offline, you can still play it. On iOS, unless you have a jailbroken device with a time-glitch, you are out of luck. Skip university