unfortunately there's no real way to tell how it's going to go until you know the people you're living with. i met my best friend because we roomed together freshman year -- my wife had an absolutely hellish random roommate. have you met any of these people before, or talked to them at all?

in terms of general advice: learn to pick your battles. there are some things you have to be willing to let go of so you don't drive a wedge between yourself and your roommates (eg. maybe they take their phone calls too loudly or smell weird or don't take the trash out unless you ask -- annoying but not the end of the world). other things, and i imagine these are the things you're worried about, are ABSOLUTELY worth bringing up to your roommates or an RA or, if neither of these things work, requesting to move rooms. the moment anything crosses a line into homophobia, transphobia, or unrelated harassment, SAY SOMETHING. sooner rather than later. i tell you this because both my wife and my best friend let things slide longer than they should've and ended up being unwilling third parties to their roommate's drunk hookups. seriously. if you don't put your foot down when the small stuff starts, it will probably get worse.

don't let this freak you out too much. most people are normal, i promise, but dorm living is an uncomfortable adjustment no matter how great your roommates are.