Every single time I start a new thing I have all my fears and doubts back again. At this point of my life I know exactly where they come from and why they come... but they still come. I have accepted it as a normal process - it's always happening when I am going into something "unknown" and "new" so ... it is just what it is :) Sometimes I even manage to make fun of my thoughts e.g. "Oh, this thought again! Couldn't you think of something new and more original?!" :D
I really like the insightful journey you make! Cheers!