It's all too easy to get bogged down in shoulda-coulda-woulda as well as, 'But I could never do that.' Don't put limits on what you can achieve before you even get started. What's even more discouraging, however, is when you demand too much of yourself at once. So you want to sing like Kelly Clarkson but can't read a note of music? Start small. Look up a voice teacher. Next, maybe sign up for lessons, and so on and so on. After that, the possibilities are endless.