Clarify with the facility before you accept any position. Ask what their rotation is if any.
I worked nights as a psych nurse. Do you have any kids? Young ones? Or spouse? Believe me, it’ll suck. I had two toddlers and was preggo and had my baby all while working nights. Our facility was 8 hours, with Friday nights and Saturday nights being considered the weekend. It would be a 3 on, 2 off, 7 on, 2 (weekend) off. Repeat. They also offer 10 hour shifts 4 days a week, or a 7 on and 7 off. Every other weekend was required, as it typically is for inpatient facilities. Many days, you’ll feel like all you do is eat, sleep, go to work, repeat. Good luck