My freshman year wasn't too bad. Just... don't piss off the upperclassmen. We get wicked ticked off when freshmen think they're the best thing to walk on this planet and they don't respect their elders. In my school, freshmen have a hard time only because the upperclassmen want to teach them a lesson and put them in their place so they learn how high school works. Not to bully.
I started High School last Tuesday, and all I have to say is to not talk to anyone between classes, because although I have five minutes to get to one class to the other, I have to run across the whole school to get to them, and I barely make it on time.