Just wanted to insert a comment here on the nature of the so-called and much-maligned internal editor.
The internal editor is not the same thing as the internal critic.
The internal critic is the "voice" that tells you your writing is crap, you're an imposter, you'll never get published, your writing sucks, you're a worthless human being, why did you ever think you could write, and by the way, that scene you just wrote is utter garbage.
The critic is the part of you that's pessimistic, rebellious, and fearful. The critic is not only useless in terms of offering any constructive help, it's dangerous and destructive. It will stop you, if it can. You need to take it out back, put it up against the woodshed wall, and shoot it.
You may need to do this often, because it has a nasty tendency to resurrect itself.
Some writers hear this critic far more than others. For those who do constant battle with it, I'm telling you now that you will never, ever succeed as a writer (or probably anything) until you find a way to shut that voice up.
You can't literally shoot it, of course, but you can develop self-confidence and self-belief, and those come through growing competence, which in turn comes from practice and experience. And the more confidence you have, the less you'll hear that voice.
The internal editor, OTOH, is your friend. The editor is the analytical part of your brain that helps you see your work objectively and fix problems. Many writers find that they can't work creatively and analytically at the same time, so they ignore the editor until it's time to do revisions, usually after the completion of a first draft.
Some writers flip back and forth between the mental states. They create, edit, create, edit.
A few writers--a very few (I'm one, and I personally know maybe one other writer who is like this)--work in both states at once, so that the editor becomes a tool of the creator, and the creator aids in editing. The two are inseparable and indistinguishable.
Everyone's brain is wired differently, so there's no right or wrong approach to writing, except the one that seeks to cut the legs out from under you before you're even started. That approach is pure trouble.