What is the priority nursing action for monitoring the vital signs of baby cacho during the post-neonatal care period (90 minutes to 6 hours after birth) ?

A newborn baby, Baby Cacho, was born 30 minutes ago via spontaneous vaginal delivery to a 28-year-old primigravida mother. The baby is currently in the post-neonatal care period, requiring essential intrapartum and newborn care (EINC) interventions. As a nurse, you need to monitor the newborn’s vital signs closely during this critical period.