You're afraid because you're thinking about the end, not about what you're doing.
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.
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.
A painting is a collection of a series of corrections.
If it's all wrong, it's all right.
I don't look where I'm going, I look where I've been.