I started writing about 1.5 years ago seriously....failed about 10,000 words in on my first novel. I realised that that story was too big for my current skill set, and I struggled...those 10,000 words took me about 3 months....
I then gave up and stopped writing until September this year, where I started to write a new story. This one is smaller in scale and less complex in terms of characters to start with. And like some people said, it took on a life of it's own and started to write itself.
That makes it sound easy, but it still was not!
It's hard work....you have to make yourself sit down. I have rituals to ensure I'll do some writing...as in when I have a cup of coffee, I will write. But equally without one, I won't...
To start with I wrote in sequence, but about 3 or 4 chapters in, my mind had already raced ahead to the ending, and it was such a good one I decided to write the ending before carrying on from chapter 3 or 4....
I then worked backwards from the ending...
I then started to add in new events which made more sense....
I have probably edited the thing before it's finished by re-reading as I knew the storyline needed changing due to me hopping around...
So maybe you can write out of sequence, as long as you keep on writing, and not get stuck in one place and stay there.
My advice is to write, just write even if it's crap. It's hard enough work just to get crap down. Things happen during the day to stop you from writing. I've taken the last three days off writing due to food poisoning, starting a new job, sorting out finances.....
I wrote probably 60% crap of story, bad phrases, poorly constructed action scenes, words that barely made sense. But as long as I got on to the paper what it was that I knew I was trying to say, I could go back and change it for the better later on.
I've edited the story twice now, and it needs the ending polishing up and half a chapter writing, but I'm really happy I got to 30,000 words....
You will too!!
Set yourself a target, i.e. 1500/2000 words a day. Finish off the story by end of the year. Don't worry if it's a load of rubbish by the time you get there, by the merit of simply writing, you will improve. So by the time you get to the second, third or even fourth edit, you writing skills will have gotten better and hopefully the story will be what you hoped it will be.