Don't be afraid to make mistakes. The fear of being imperfect or sounding silly will paralyze your creativity, not allowing you to find the needles of greatness in the haystack.
I think it's far better to just accept the fact that we will make mistakes. This way, when they happen, we can see it as a learning and growing opportunity. Over the long run, enough mistakes will result in a lot of successes.
Keep writing (and learning),