FYI: off the topic but relevant,
My niece attends Long Beach. And it’s known as CAL State Long Beach or just plain Long Beach. They don’t go by “Long Beach State University”.
Most of the Cal States go by their names: such that they are usually known by their locations or by their CSU label-Cal State, otherwise they are known as:
Fullerton
Fresno State
Northridge
Sacramento or “Sac” State
San Bernardino
Sonoma State
Dominguez Hills
Channel Islands
East Bay
Monterey
Chico
Humboldt
Bakersfield
Stanislaus
Cal Poly Pomona
Cal Poly SLO
Cal State LA
Cal State San Marcos
The only ones that I know that use the acronyms are SDSU, SJSU, SFSU.
It has to do with how the California legislature and the Regents named the universities. So you hear students say “I go to Long Beach”, “I go to Humboldt”, “I go to Chico”.
OP you are so close you can visit the campuses. I know traffic is bad going into Long Beach and Chapman is in Irvine but you’re really close enough to spend several days there if you wanted to and see the differences.