When you go web novel, there is a section dedicated to creating your own work. Hell, even i did it, though it was a literal shit post fest on my end, and it was a pretty easy process. If you mean earning money then you need an audience. But that's putting the cart before the horse, so you need to actually start working on a preferably well-written novel. I hoped this helped but if it didn't I'll be around to answer more questions.