Don't worry, everyone gets lost their first day or week, then you get into a routine and figure it out. After a couple days he'll be having a great time and be oblivious to the fact that you are still worrying about him adapting!
My first day of college I asked someone where the library was and was told "It's the only 15 story building on campus." I thought that was a rather rude answer then realized I was about 50 yards away from it

. In retrospect, I am sure the person I asked wondered how I got admitted to the university or found the doorknob that morning! :roll: