A nursing interview is a judgment interview. The person across from you is trying to picture you on a unit where several things can go wrong at once. They want to know whether you notice a change in a patient, whether you speak up when an order does not match what you see, and whether your handoff would let the next nurse start without guessing.
Practice answers that stay inside one situation. Name the setting in a few words, such as a med-surg night or a clinic afternoon, then the patient problem, what you assessed, who you brought in, and what you did next. Leave out anything that could identify the patient.
If your experience is mostly school clinicals, say that in the opening line and use the richest shift you actually had. Inventing a charge role or a specialty you only watched is easy for a manager to hear.