To face your fear of writing, right now, is to break though the personal jail cell that you have created. It will release you from the insecurity that holds you back and open you to the unknown adventure that lies ahead.
But first you must let go of the safety you hold onto, the security that holds you back. It will be the beginning of the death of the old self, the one that makes excuses as to why you are not doing the work.
The adventure is on the other side. The thrill and the excitement of the work is waiting.