Being an author is rarely a matter of dropping a title and watching the dollars roll in. It has to become a way of life and something you are always marketing.
How do you write? Are you bubbly or stoic? Technical or down-to-earth? Academic or opinionated? Long-winded, or short and sweet? There are so many styles and yours is unique to you. I can guarantee you that nobody writes exactly the way you do, so look within and get to know what your style is.
You’re probably realizing by now that a book may need not one, but two or even three edits before it’s publisher ready. How much time and money you want to spend on editing is up to you, but it’s a necessary step no matter what you’re publishing.