Daunting, isn't it?
A novel is a big project.
You have three or four things working for you.
1) About most everything you write for the first six months, you're going to discard or change beyond recognition.
This is a good thing
-- doesn't sound like a good thing, does it? --
because it means everything you're about to sit down and write is throwaway and practice and on-the-job training.
You don't have to get it 'right'.
You are free to write stupid stuff and awkward bad stuff or stuff that doesn't fit in the story.
Whhheeeee!!
Freedom.
The first million words are for practice.
2) You don't have to write 'a novel'.
You only have to write this one page
that is in front of you.
(I'm stealing this from Bird by Bird which says it a lot better.)
So you sit down to write the scene where Rory offers Gamorgan a glass of lemonade and then clouts him over the head with an aubergine.
Or even, you just describe the aubergine.
You only have to look at that one square inch of story when you are working.
3) And no one is right.
John BigNameWriter uses crayon on yellow lined paper and never revises.
Dorothy PopularCulture outlines with stickynotes and a big bulletin board.
Lena Literati spends six months doing research before she even touches her keyboard.
You cannot write like these folks because you follow their method.
And the only one who knows how you should approach writing is you.
4) You get to do more than one thing at a time.
That is ... you get to work on your outline between 10 and 11 in the morning,
and then fool around with scenes written out on 3x5 cards for a while over lunch,
and then do some research on 18th Century locomotive slang on the bus home,
and then, after dinner, sit down and write the third scene in strict chronological order or scene 27 because you see it.
You can try several approaches at once.
They are not mutually exclusive.
5) The only dead-certain, absolute requirement you face as you start your story
is that you must put your butt in a chair and your hands on the keyboard and produce words.
It is good to start this right off.
Go thou out and produce copy.
Make words.
Fill the screen with words.
Nora Roberts put it well. "You can fix anything but a blank page."