What is aortic insufficiency? How can I live normally with it?

It depends on how severe the symptoms are and what you consider to be a 'normal' lifestyle. If the symptoms are (as you say) mild, then all that may be necessary is to have a regular echocardiogram to make sure that the situation is stable. If your blood pressure is high, then treatment with certain blood pressure medications may help the condition from worsening. You may need to limit activity that requires more work from your heart. You should talk to your health care provider and take his/her advice. As long as you avoid strenuous exercise, there is no reason why you shouldn't enjoy a 'normal' life. There is a list of simple tips here: http://www.webmd.com/heart-disease/tc/aortic-valve-regurgitation-living-with-aortic-regurgitation