Fear and doubt are coming!?

The book launch of 'Freya's Child' is quickly dawning and fear and doubt's creeping fingers are beginning to probe my head. Fear that I am wasting my time and doubt that I am good enough.
I know this to be true of anyone who creates - we all have doubts, even a moment, felt then quickly disappears. Mine hold on with a vice grip and I wonder how to dispel them?
I know it comes from lack of understanding. My fear and doubt of the internet, how it works, how others can get thousands of sales because people can find them, while I contemplate how many people read my blogs? My website? Who do I reach in my pathetic crawl as I attempt to learn how a computer can help my talent?
I read this back and I sound as if I'm giving up. Am I? No. I began this blog to follow my journey as I write - good and bad, highs and lows. Even if it is only for myself - it will be a good indication of my writing path. x