You must do what you enjoy in life. Otherwise, the stress of doing something you don't like day in and day out will make you miserable. Life is seven steps forward and five steps back. Education teaches us to learn, and there is something both humbling and empowering about that.
If, after doing all the legwork, you still don't dare try living your dream, then I think you have failed straight away. Falling flat on your face would never feel good, but remember, you would have learnt a valuable lessons after every failure. Hong Kong tycoon Li Ka Shing started out selling plastic flowers. If he hadn't dared to live his dreams, would he be who he is today?
You must have gall and guts to execute any plan for passion. Life is short, so make the most of it. Small hearts beget small actions. Generosity, on the other hand, generates happiness. Always ask yourself: If I had only half-an-hour to live, how would I want people to remember me?
