You're afraid because you're thinking about the end, not about what you're doing.
The first thing you see is the last thing you do.
A painting is a collection of a series of corrections.
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.
It is in the contrast of light and dark that design happens.