What should I do to lower my risk of high Cholesterol and high blood pressure?

You need to be treated for both your high blood pressure and your cholesterol. At your age I would recommend diet & exercise in addition to drug treatment. You may find that a healthy diet and exercise is sufficient!
You can read more here:
https://www.cardiachealth.org/heart-information/your-cholesterol
https://www.cardiachealth.org/heart-information/hypertension
https://www.cardiachealth.org/heart-disease-treatment/what-you-can-do
Medications:
https://www.cardiachealth.org/heart-disease-treatment/heart-disease-med
https://www.cardiachealth.org/heart-disease-treatment/heart-disease-med
Diet:
https://www.cardiachealth.org/patients/diet/mediterranean-diet
https://www.cardiachealth.org/patients/diet/heart-healthy-food
A diet designed specifically for patients with a high blood pressure:
https://www.cardiachealth.org/patients/diet/the-dash-diet
Here you can calculate your risk for heart disease:
https://www.cardiachealth.org/risks-benefits/cardiovascular-risk

Hope this helps,
Dr T
https://www.cardiachealth.org/