Don't take this as discouragement; just one person's perspective that may or may not help you prepare. I was really looking forward to experiencing student life at UCLA and found it sometimes hard to find there. Better than most CC's? Definitely! But it's a big school with a large commuter and off-campus student base. The place tends to clear out on weekends, so much so that fraternities throw their parties on Thursdays instead of Fridays.
The nursing school is in the health sciences complex which is as good as off-campus in relation to 'regular' students. There's little to no overlap with the rest of the university. You'll have to make a special effort to find ways to get involved on campus - and nursing school don't match up well with the schedules of 'regular' students.
Just so you know, nursing school curriculum is much more structured and more time-intensive than most other undergrad programs. And that doesn't include studying, preparing for clinical days, and travel time to and from off site clinical locations. See if you can get a copy of a schedule to get a feel for it.
If you are already accepted to the school of nursing and are considering dorm living, inquire about being accomodated at the grad student dorms. First off, it's *right* *next* *door* to the nursing school (as opposed to a 20+ minute walk up and down a hill to the undergrad dorms). At UCLA, undergrad dorms tend to be mostly first and second year students, with upperclassmen moving out to shared apartments.
As an upperclassman with serious amounts of coursework and graduation not all that far off, it was at times frustrating to be surrounded by 18-yr-olds just starting college, many clueless about what they wanted in school, some just wanting to party. Grad students, on the other hand, know how to party, too, but they have figured out some kind of balance already.
Another option to look into is Co-op Housing. If you're not looking for luxury, not only is it more affordable than the dorms, it's a wider mix of student types (again, not all first year 18yr olds) and right amongst the off-campus student-packed apartments and few surviving fraternity houses (Greek life isn't that big at UCLA). It's not any less convenient than the inconveniently located undergrad dorms.
Finally, the diminished Greek life at UCLA means many sorority houses have been converted to other purposes, including general student housing. This housing is the absolute closest to the heart of student life at UCLA (yes, MUCH more convenient than 'on-campus' housing). These boarding houses aren't owned or operated by UCLA, and I'm not sure where you'd find for listings for that these days. They aren't necessarily all female anymore, I don't think.
Enjoy whatever you end up doing!!!