I'm not a new nurse, but I remember well my first job working nights very well. It took me a good two months to get acclimated. I would wake up in a sheer panic not knowing what time it was or where I should be at that particular moment, falling near asleep on the drive home, and feeling terrible.
I have now worked nights for 11 years, going from 8 hour shifts to 12 hour shifts ( a little harder) but I absolutely hate day shift. I enjoy waking up on my own and not to an alarm clock at 5-6am. Some days I'm up by 2pm others I sleep in until 5pm. I've found it works best not to fight it or try to put my sleep on a schedule, I just sleep when I'm tired ( preferably at home, not at work or the drive home). I don't sleep many nights anymore (my days off) because my body is just used to it. So I find things I can do at night as not to disturb others to much, like searching the web

. I can't say I don't ever get tired at work, I do especially if it is slow, but people do on day shift too, I just keep busy doing something. Exercise helps before I go into work to wake up the body and keep things energized. So I'd give it a bit more time before making a change, unless you just truly don't want nights.