I'm an incoming CS major freshman from CA. Can somebody help me out :P

Well, right now I'm still a high school senior in CA. I applied to several colleges, and UIUC is the only one I got into. It was either community college or this college, so it kinda left me no choice. But it's not that I look down on UIUC :P I'm just thought that UIUC accepted me just because I'm from outer state. Well, I actually have to pay about $48,000 with no grant/scholarship. Oh, let's just say I'm pretty f***ed already.

Putting my personal grunts aside, I need some useful information/tip to survive in UIUC. I really don't want to waste my freshman year trying to understand what the hell is going on in the college. (That will get me nowhere). Here are some major questions:

1. I still haven't applied for housing. The site won't let me log-in. Hopefully it will work soon. If it does, which dorm should I sign up for? I'm quite a social person with almost no prejudice in mind. (And I'm an Asian). I heard ISR is the closest to engineering building... should I take this?

2. What classes should I take for my Freshman year? and what do I do with my AP credits? I heard some people take the classes they already finished in high school, just to raise their GPA. Smart choice? FYI, I took AP Calc, AP Chem, AP Econ, AP Stat.

3. Frat/Sor. What are these? I've seen people mentioning these, but I really don't grasp the concept. Greek stuff? Whaaaaa?

4. I REALLY NEED SOME MONEY. What action should I take to find jobs/internships/scholarships/etc.? (Except selling my body.) Oh, btw, I'm a dude if you didn't notice.

5. I am not sure if CS is my thing. It could be ECE. (Well, I know I like computers. That's for sure.) Any significant difference between the 2? And please, use easy words to describe them.

6. LOANS: FROM WHERE SHOULD I GET THIS? I THINK THIS IS THE MOST IMPORTANT QUESTION OUT OF ALL. FYI, I don't want to burden my parents with my loans.

I doubt that anybody will read all these things I wrote up there, but if somebody does, I deeply appreciate your spending of time. But please, don't troll. :)

-Will