Hey girls! Congrats on getting into Nassau, I just graduated from there last semester. To answer your questions, yes all of the J's will be together in the same classroom and have the same schedules and go to the same hospital, but when in the hospital you will get broken up into 3 or 4 different clinical groups. You will be rotating probably 2 or 3 different floors.
You probably start clinicals the 4th or 5th week after you learn a few skills like Blood pressure, pulse, bed baths, etc. Also one thing I loved is that the first day on clinicals they do not make you even touch the patient- just talk to them. This was great because I was nervous my first day and it helped me ease my way in.