Mild aortic stenosis is commonly seen among people of your age group. As long as it’s not affecting your life, you should keep on with your activities since a sedentary lifestyle will only harm your heart.
However, if you feel out of breath, don’t push yourself. You should make regular echo to follow this stenosis progress. But for now, it has no consequence on your life.
You will need to keep a close eye on the stenosis. Are you schedule for echocardiograms every few months to monitor the stenosis? If the stenosis starts getting to moderate, you may want to talk to your doctor about fixing it. Some procedures can be done through a catheter. You do not want to watch until the stenosis is severe, as the risks increase. As far as activity, don't push yourself. If you feel tired, rest. Ask your doctor if you should have lifting restrictions.