There was a report on several hundred transmen and transwomen presented at WPATH in February by Louis Grossen, an eminent endocrinologist. His conclusion on the biggest survey of trans*people so far suggested minimal effects of T on the health of transmen. It was not as favourable for transwomen on oral E particularly in the the over 40 overweight group of women.
So I wouldn't worry, live a healthy life, don't smoke, eat healthy, don't be overweight and exercise. You should be fine as far as the effect of T is concerned.