I tell my artist friends, There are no mistakes! And then I'm still afraid of making mistakes.
So then I don't take risks and I stick to what I know, because the other option -- the possibility of mistakes option -- is so uncomfortable.
What a waste of time.
What a waste of paint.
This is not going to go anywhere.
This doesn't mean anything.
What are you even doing.
An old friend of mine once said, "you'll know it's exciting because it will feel exciting."
Let the excitement be bigger than the fear.