Let's discuss the writing process a little. Some people have difficulty with that. There are people who can start with a bang, but taper off without actually ever finishing a book. They just can't connect things to reach the end or they grow bored with the story. 

You need to find a process that works for you so you can succeed and make it from point A to point B.

Not every author plots things out. Those of us who don't are generally called pantsers. We write by the seat of our pants and plot nothing. I dislike outlining, I feel trapped by it. Yes, I know you don't have to adhere to an outline, you can change things. If I do change things from an outline then I feel like I'm losing something and it stresses me out. It may sound stupid, but outlining simply doesn't work for me. I need the freedom to create. Do what works for you, don't follow a trend if it isn't right for you. The idea is to make the process as stress-free as you can, don't add to it because you believe it's the right way to do things. 

Every writer has their own process. There is no set way that you must write. Do whatever makes you comfortable and allows you to get the job done. Whether it's an in-depth outline with charts, pictures, and all the bells and whistles, a basic one that hits the major plot points, or no outline at all. If it works then do it. There are books I've written that started with just one sentence that popped into my brain. Others began with an idea for one character. I have never once sat down and figured out how a book's storyline will run from beginning to end. Most of the time I have zero ideas what's going to happen. My brain works it out as I go along. 

If you get stuck, find yourself a group of author friends (even non-writer buddies can help). Bounce ideas off of them and see if they can help you get out of the corner you've written yourself into. We authors like to tell everyone we're introverts, and while that might be somewhat true, we're a social lot, especially with one another. Social media helps us get out and talk to people without the anxiety of actually going out into the world. I know here in Vegas there are a lot of local author groups, some general groups, some for specific genres. Facebook has tons of groups for authors as well. 

Once you have your idea and you're ready to begin you need to figure out where you're going to begin. Is there a prologue or are you jumping right into the story?

What is a prologue?

A prologue helps to set up a story. It can give a few background details and help to establish a setting. In general, its main function is to tell your readers something early on before your story begins and connect them to the main story. Ask yourself if you might need some background to help your readers understand things before you jump right into the story. Are there things they might be wondering about if you don't give them the information, will they be confused? 

Once you establish how your story will begin, do you know your characters? At least the main ones. You can drop in random, background characters throughout the book as they're needed. But you need to know your main characters. They need some deep thought. From their name to their appearance, to the quirks that make up who they are, and finally their backstory.

Treat them as if they're real because they are. If you can't manage to make them real to the readers then they won't want to read the book. Your characters need to live and breathe. They must have a real, full life. You can't simply worry about if their name is perfect. Think about their family. Do they have siblings, do they get along if they do? Are their parents still together, divorced, separated, are they both still living? How was their childhood, was it happy, sad, tragic? Do they have any little quirks? Try and make them unique, while your character can certainly bite their nails, find other things that separate them from the norm. I have a character who makes little braids in her hair when she's upset. There are iconic characters who have behaviors that stand out. Think about AL Bundy from the TV show Married with Children. If you've ever seen the show, you know the character. He's a shoe salesman, a total loser, and when he sits on the couch and watches TV he usually has his hand stuffed into the waistband of his pants. That hand in the pants is a very memorable quirk that is unique to Al. 

Writing is work. If you don't put in the work to make the story come to life then the readers won't be attracted to the story. 

Your readers must feel as if they're in another world, with other people. Make it all as real as possible.