A 58-year-old man with newly diagnosed osteoporosis (T-score −2.9 at femoral neck) and a prior fragility fracture of the distal radius 18 months ago presents for management. He has normal renal function, serum calcium 9.2 mg/dL, and 25-hydroxyvitamin D 28 ng/mL. He is on no prior bone-active therapy. His 10-year FRAX probability of major osteoporotic fracture is 18% and hip fracture probability is 8%. What is the most appropriate next step in management?