If your cholesterol levels fall outside the recommended limits, then you should actively consult with your doctor about the most effective course of treatment, which will almost certainly include cholesterol lowering foods as well as lifestyle modifications, exercise and possibly medications.
Based on your cholesterol levels and your risk profile your doctor may recommend diet and lifestyle changes without or in conjunction with medication.
Follow the treatment regularly and test your cholesterol level as advised by your doctor. It will soon become clear to you that it is perfectly possible to lower your cholesterol when you have the willpower, dedication and strategies to make it happen.