A 60-year-old woman with no cardiovascular disease, chronic kidney disease, or diabetes has an LDL-C of 4.2 mmol/L and total cholesterol/HDL-C ratio of 6.0. Her 10-year cardiovascular risk is calculated at 18%. According to the 2021 Canadian Cardiovascular Society dyslipidaemia guideline, what is the most appropriate lipid-lowering strategy?