A 55-year-old man undergoes a health check. His calculated 10-year cardiovascular disease risk score (QRISK3) is 18%. He has no history of CVD. His blood pressure is 145/90 mmHg and total cholesterol is 5.8 mmol/L, LDL 3.5 mmol/L. According to NICE CG181, what is the most appropriate initial management regarding lipid modification?