A 38-year-old primigravida at 39 weeks gestation presents for induction of labor due to gestational diabetes. On examination, the cervix is 2 cm dilated, 50% effaced, firm consistency, and the fetal head is at −2 station. The Bishop score is calculated as 6. Fetal heart rate is 140 bpm with normal variability. What is the most appropriate next step in management?