I bought my first car around this time last year.
When you go to the dealership,
1. Know what you want, that way you don't settle for just anything. Their job is to sell cars. Some have so many little tricks up their sleeves, beware.
If they don't have what you want, don't be afraid to leave. There are other dealerships out there.
2. Get their business card, and contact them if you have any further questions. (The dealership isn't going anywhere, and you know where to find them, after all you're there.) I wouldn't give them any info until I knew I was buying the car.
A couple years ago when I first played around with the idea of buying my first car, I made the mistake of giving them my number and they called me for
everything. It was annoying. I changed dorms every semester, so after that semester, they couldn't reach me at that number anymore. Last year, when they tried to get my number, I was adamant about getting their card and contacting them if I had any more questions.
It's great that you're doing a lot of research, I did and I'm very excited with my purchase. I got a very low interest rate, and a very good car.

I my love car, it's so me! That's all I can remember for now, feel free to ask more questions. Good luck!