I feel almost the same:
I overcame the fear of someone reading it by finding a password protected online application, diaro app.
But! I cannot help the shame what I feel when I wanted to read it back, and I keep getting discouraged and stop the whole thing.

The whole thing is ridiculous anyways, because I always dream about being an author (don't worry, English is not my native language), but I'm not able to write 1 single page without having doubts and leave the project because of my insecurities.

I read here and there that for AVPD people sometimes it's good to sublimate their feelings through writing, also graduate exposure is a not too bad therapy tool, so exposing myself to my fears and practicing writing shouldn't be a bad idea.... just cannot commit to that