Thanks everyone. I was able to start a career and it didn't effect my university enrollment.
https://i.imgur.com/AD0zAHU.png
Weird thing is I've already completed the Scientist career. 2 years ago.
https://forums.thesims.com/en_US/discussion/953557/cant-believe-i-waited-this-long-to-start-the-scientist-career/p1
I wanted to upgrade my cloning machine but got the message it was unlocked at level 8 of the scientist career. Go figure. :p
https://i.imgur.com/SxOS0Ud.png
So I'm going to zip through that really quickly and then finish my physics degree. I was sorta kinda ready for a break anyway because this would be my third degree in a row.