As @moonboy said, find the best thoracic surgeon accesible to you in a major Medical Center, your idea of geting a cardiologist who specializes in aneuryms is right, it makes a huge differenece (not all cardiologists are aware of the latest and the specifics of aortic diseases) and if he/she happens to be in the same hospital/ group as the surgeon even better (not necessary though it just makes it convenient).

Moonboy gave you a great list, I would add, if you need it, find a good therapist, someone you can connect with, they can give you a lot of tools how to manage stress and anxiety. Your idea of yoga is great!!

I had my aneurysm repaired 5 years ago, had an awesome team of surgeon and cardiologist, I still see the latter every year.

All the best