I'm the Company Commanding Officer for the freshman Company at Old Dominion this Summer/Fall. As a consequence, here is what we are expecting our schedule to look like.
Day 1: Arrival/Checkin/gear issue
Day 2: PRT in-test in the early morning
Day 3: 3rd class swim test
Day 4: O-course at Little Creek NAB
Day 5: Ship/Squadron tours at NS Norfolk
Day 6: Leadership Reaction Course at Ft. Eustis
Day 7: Graduation/Pass In review
As you can see, there is a lot of down time, especially at night. During these times, you will learn to wear you uniform, drill, attend classes regarding military rank/lifestyle/knowledge/expectations, etc. The bolded items are things you need to be able to pass by the end of the semester, so if you don't do well at first, you are going to be remediated the whole semester which = extra work for you.
I'm sure your school will be similar. You will undergo some stress, both mentally and physically, but it's O-week, not Marine Corps boot camp, so pay attention, do what you are told and you will succeed.
If you have any questions, PM me. Congratulations and good luck...