Someone decided November had nothing in it so everyone should write a novel. If you’re doing this you may decide to google a bit of advice at some point or you may be heading into it for the first time and wonder what’s the best way to go at it.
After thirty plus years of writing here is my only writing advice for the creative phase of construction.
Take a few minutes to get into your best state, your happy place, full of and reminded of all the things you really like, stories you love, images, feelings. Then imagine a single moment of something that seems very intriguing. Write down what’s happening. Continue until the month of November has ended.
At that point you might try looking at other things you could do with what you’ve got. But really you can write very successfully just by doing that. One moment at a time.