Don't be afraid of your [artistic] material or your past. Be afraid of wasting any more time obsessing about how you look and how people see you. Be afraid of not getting your writing done.
Perfectionism is the voice of the oppressor, the enemy of the people. It will keep you cramped and insane your whole life, and it is the main obstacle between you and a shitty first draft. I think perfectionism is based on the obsessive belief that if you run carefully enough, hitting each stepping-stone just right, you won't have to die. The truth is that you will die anyway and that a lot of people who aren't even looking at their feet are going to do a whole lot better than you, and have a lot more fun while they're doing it.
In real life, most people don't actually curl up in the fetal position in order to tune out their feelings. Most people get strung out on relationships with other people or on work or drugs or alcohol or food. But a similar trance is induced.