You're afraid because you're thinking about the end, not about what you're doing.
I don't look where I'm going, I look where I've been.
I switched to painting with my left hand to be in better company.
It's not what you paint. It's how you paint it. You don't have to paint elaborate things. Paint simple things as beautifully as you can.
If it's all wrong, it's all right.
See it in terms of paint. We don't learn subject matter, we learn paint. The musician can play any score that is set before him.