We all have a story to tell. We can tell it in a short story--or we can write a novel. Either way, the process begins with a story. If there's one in you--as there is in each of us--there is a way to get it out.
The first step is to find that story. One that you need--want--to tell. It's important to need to tell it because that need will drive you to tell it.
Then, tell the story quickly--on paper--in a couple of pages. That will be your guide, your driving force, in telling it.
Thirdly, write that first chapter--or prologue--or page. The important thing is to get started. That first page is the most important one--not because of what you have said but because you have started.
Finally, write a page every day. Religiously. And in 250 days you will have your first novel. Sounds simple? It really is.
Good luck and happy writing. Let me know how you're doing.