Why do you write? How?
It's a question that, to a writer, requires no answer or is difficult to define to those who do not experience the joy that comes with it. Writing comes naturally to those who enjoy it, whether the product is amazing or not. Writing, like beauty, is in the eye of the beholder, so who is to say that one person or the next will enjoy it? It is a question that publishers everywhere try to answer. The truth is, no one knows. It really and truly is a gamble.
Getting technical, the only truth in terms of writing is spelling. The only thing in the English language which is standardised, spelling is the only thing to worry about. Even grammar can be played with to enhance character or setting, or to deceive (but obviously there are still places where you can go wrong, as the grammar critics online will tell us all). Check out Oxford Living Dictionaries if you are unsure.
The only thing to do is to write from the heart and, importantly, from experience. Writing progresses with the reader and more often than not is affected by your mood at the time, as well as your surroundings.
Here's the task:
Take a look at your writing.
Don't worry if you think you have put too much into your story because the best writing does. How else do you know what it feels like to love, lose someone, achieve something, to hate, to cry or laugh? This way, you can always cut back but you need the content in order to do so.
Get as many people as you can you read your work. If they hate it, continue. If they love it, continue. Take everything with a grain of salt, because negativity and doubt are very strong ingredients when you're putting together your next project.
Positivity and experience are the most important factors when it comes to unlocking a great narrative. Writing with experience doesn't take years of having your book at the top of the bestseller list, only the number of years you have been living.