I have Grammarly on my mac. It makes a great positive difference, but for NaNo, I would be careful because you could spend valuable writing time making corrections. Send your editor on a nicer long vacation. When the firt draft is finished/NaNo is won, Your editor is no longer on vacation.

Relax and enjoy the writing process. Set your imagination free to create. Even if it doesn't make sense, go with it because eventually, it will work out.

I use chapters to allow me to jump from related ideas to others as needed, or something that will work for you so that if you're stuck in one place you can move to another part of the story and keep writing. You do not need to jave a completely finished story. You do not need a polished story. You need to write 50k of your story and win NaNo.

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