I have experienced these exact same fears...in fact they had held me back from doing exactly what I am doing here on Steemit, sharing my thoughts and ideas with the world. For years I have thought about starting a blog or website, but for fear of what others would think or fear of failure I did nothing instead. Thanks to Steemit I have actually taken the plunge and can already use my experience here as motivation to take action on future ideas I have! Thanks Steemit, and thank you for sharing!