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.
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.
The first thing you see is the last thing you do.
A painting is a collection of a series of corrections.