From my experiences, it's not a big deal at all. Of course it's scary going in there not knowing what it's going to be like. My program was mainly educational programs all morning (anger management, wellness, stress management, etc), an hour for lunch, then a group therapy session for an hour in the PM followed by an hour wrap-up session. The whole day was 9am - 3pm. The first day of course was a little bit stressful as it was your first day on the inpatient unit... it takes a minute to get accustomed to the way the program works but everyone is usually pretty welcoming. I really wouldn't be that stressed out about it. I think once you get there you'll settle in quite nicely. Most partial progams run about the same so I would expect for yours to be similar. Let us know how it goes!! Hopefully you get a ton out of it!