Harry Potter Fanfic

My name is Atarah, and i have been sent to Hogwarts School of Witchcraft and Wizaradry. I have no friends or family.
I have good looks, and am one of the smartest in my classes, but I am still not so sure about this "magic" thing.
I didn't have much of a life before, living on the streets and at some homeless shelters. I'm a little wary about going to this school, I mean, what if I can't really do any magical spell,(Or what ever they do there?.)
And worse of all, what house will i get into? What if it's the wrong house and everyone hates me? Will I ever have any friends?