I believe it was Ernest Hemingway who said something along the lines of, “The first draft of everything is shit.”
He’s not wrong.
Writing a first draft is getting everything out on the page. Don’t concern yourself too much with character development or the amount of dialogue/action/description you have compared to one another. Just get everything down on paper/screen.
Your first draft is not your first draft– there is no doubt that when redrafting, you will delete probably all of it. That’s a good thing! Your real first draft is the ‘polished’ one after about four rewrites.
My point is: if you focus too much on your first draft, it will be dragged out of you. There is no enjoyment in focusing on every word of every sentence, trying to fit everything together perfectly first time. Enjoy the process! Just throw everything at the page and take a step back once you’ve done.
A first draft is just a complete idea, but it’s an idea which can change and that’s the beauty of it.