Hello and Welcome to the Chrons!
If the "layout" you're talking about is an outline of the novel, so what you've done is write the story in a kind of summary form, then it might simply be that you're a pantser by nature not a plotter. By and large, plotters like having outlines and they're happy to fill in all the details afterwards, whereas pantsers like finding out about the story, and enjoy the scribbling down, but once they know the story they sometimes lose enthusiasm for the actual writing. If that's the case, then it might be an idea to put this current project on hold and start writing another, but instead of planning it in advance, just write.
Alternatively, sometimes new writers have great and wonderful ideas, but then get a kind of paralysis when it comes to the actual writing because they're afraid of mucking it all up and not being able to do justice to the ideas. In that event I'd always suggest parking the marvellous ideas for a while and write something else instead, so as to build up confidence in both oneself and one's writing ability.
I think, also, that for some reason writing a book is looked on as being easy -- we all write at school, our friends tell us they love our stories, we read novels and think "I could do better than that!" so how hard can it be?! But no one ever says "Carving wood is easy" and gets in a bit of dead tree and a chisel and thinks they'll be the next Grinling Gibbons. We recognise that it's important for a wood carver to learn about different woods and tools, and that he'll have to work on his craft for years before he gets good at it. Writing a novel -- a good novel --
is hard. You need to recognise that and just work through it. Work at it in the same way a top tennis player works at her game -- continual practice, pushing to get better, continual critical assessment and advice, training/learning, all the boring stuff.
Anyhow, my advice: whatever the source of the problem, leave the current story and write something else, at least for the time being. And just write. Don't worry if it's bad, just write. In between writing, read round all the posts here in Writing Discussion, especially our
Toolbox thread, look at Critiques here and the Writing Challenges. And don't forget to come into Introductions and be welcomed officially!