The primary obstacles preventing One from following One's Heart seem to be the incalculable ******* excuses in One's head ultimately serving to justify a lack of proper effort- to justify stagnation, complacency, and laziness.
Overcome them or be overcome by them. You shall never know if you never try.
One who doesn't try precludes any chance of future success. One who doesn't care is unworthy of what success may otherwise be actualized.
Take the incentive to cultivate the Mind. Have the courage to follow your Heart. Have the Heart to help others do the same.