Three things have helped me GREATLY (I used to work 7p-7a and then they changed it to 6p-6a). I have only been an RN for 2 years, and all of my experience has been nights in the ED. I am now 50, just for background comparisons.
1) Blackout curtains in the bedroom.
2) Trazadone. One pill puts me out for about 6 Very good hours of sleep. I usually sleep beyond that for up to two more hours, but normal daytime noises might wake me sometimes. Yet, those 6 hours, because they are so good are plenty. The n ice thing is that, after the pill wears off 6 hours or so later, I am not groggy at all like some sleeping pills can make one. One caveat though! It tends to make people's dreams very vivid. So if you regularly have nightmares, this is not the way to go. But if your dreams tend to be nice, neutral, or even just weird, this isn't a problem.
3) You may be highly tempted, especially at your age, to switch your sleep schedule back and forth from days to nights, considering you will likely only work 3 days / week. Don't do it! For example, I typically get up at 3-330pm to lazily get ready to be at work at six. On my days off, if I am extra tired, I may sleep in till 4-5pm. If I have something I want to do during the day, I will get up a couple of hours earlier, like 1-2pm. But short of vacation when I have more than a week off, I don't switch. Trying to switch throws me way off. But then, I'm old now, lol.
Good luck, welcome to nights, and to the shift differential ;P