You have 2 health insurance options...
a. Get the school's health insurance
b. Get your own and opt out of the school's health insurance
Proof of health insurance is required at all schools I believe. I was required to have health insurance for my undergrad university.
If you're a hardcore PC user and don't think you can adjust easily, then stick with PC. It's not like PC is a "bad" option even if other people make it sound like it. Everyone's different and have different preferences. I adjusted well when I transitioned. I hated Windows 7 and whatever was after Windows XP because they were dramatic changes that weren't consistant in design and functionality in my opinion.
Apple is much more user-friendly in that the functions are designed to fit everyone, regardless of technology knowledge/experience. Yea I do miss PC sometimes because I do love to tinker with technology, but at the same time... why am I worrying about fixing my computer when it should just work? Why download all kind of drivers when I could just plug it in and it just works?
I found apple computers are more durable, yet maintaining light portability especially with the unibody design they have now (your computer is essentially in one metal case, not in parts).
I did my research before the big jump. Maybe these will help you in yours

Why a Mac?
http://www.apple.com/why-mac/
FAQ about the jump
http://www.apple.com/why-mac/faq/
DEFINITELY, go to an apple store and just PLAY with the computers. Get a feel for yourself