Watch this video below and think about it... You may be surprised in your answer, and why you never did it in the first place. It's one of the most difficult things to rely on yourself instead of someone telling you what to do, because hey, no one else can be blamed if you make the decision yourself.
Start by thinking about what gets you excited to wake up in the morning, and then go do it! You are the only one who has to live your life, and isn't it your the goal in the end to be happy?
I second guess myself everyday about studying the arts until I remember that if I do something I love I'll never want to escape from it.