A 34-year-old primigravida at 37 weeks of gestation presents to the antenatal clinic. Ultrasound confirms frank breech presentation with flexed hips and extended knees. The patient has no contraindications to vaginal delivery, adequate pelvis on pelvimetry, and estimated fetal weight of 3.2 kg. She is counselled about risks and wishes to attempt vaginal breech delivery. What is the most appropriate next step in management?