I've worked night shifts (19:00 to 07:00 following a 3 shifts on string, 2 off, 2 on, 3 off, etc.) for years and really love it now. Didn't at first because I kept fighting the schedule and ended up feeling tired all of the time/difficulty sleeping issues. I love my work now, have no administrators visiting, and that shift differential is very nice on the paycheck. However, many will not be able to adjust to the schedule, and I certainly would not hesitate to get on that waiting list "just in case" you are of the majority; easier to decline an available day slot than to continue to wait out the night shift that doesn't work for you.
Thoughts that may help:
* Always turn off your phone when you sleep during the day, and if friends/family cannot abide by "do not call me during the day unless its an emergency" after a few kind reminders, calling them at 02:00 to just see what's up usually gets the point across.
* Difficult to do, but avoid drinking anything
at work about an hour before leaving shift (if in a middle of a string of shifts). If you wake up for a pee break and see the bright sun glaring back at ya through the window, it's hard to get back to sleep.
* Turn on a fan in your room or use a sound generator to drown out daytime noise from family and the world out there. Get black-out curtains. The west Texas sun must be harsh because I have two sets of these curtains to do the job right, but it helps a lot!
* Like Julie19, my last day of a string of shifts is not spent sleeping hours upon hours. Just a couple of hours right after I get home, and then I wake up and do something constructive until night. For me, it works out to sleep through the night like a regular person on my days off and function normally through the next day. I have a family I can't neglect as well, lol!
* I don't seem to have a problem with switching from night to day functionality, as long as I do two things: 1. Force myself to take even a one hour (or more) afternoon nap on my days off, which helps trick my brain into a "sleeping before your night shift" routine. 2. If I feel the need to wake up at 2 in the morning, I do so and stay up for awhile studying or ???. Then I go back to sleep in an hour or so. No sense fighting it, and I am not groggy in the morning.
Hope it helps some in getting you through.