Hold your horses as they said in the old west. I'll give you dollars to donuts that you aren't even close to being ready for publication. Sure, you wrote a 150,000 word epic fantasy that is marvelous. Have you posted any chapters for critique? No?
Writing is a profession. Most authors spent years writing millions of words before they finally receive a publishing deal.
That's where learning the trade or not makes the difference in getting that book deal.
If you haven't been critiqued, haven't learned the common mistakes of noobie writers, then you most likely will end up spending a lot of effort sending out queries to literary agents and publishers only to receive rejection after rejection.
So how does one learn the trade?
Education via books or colleges that offer Creative Writing classes may be a good place to start but I don't believe they are essential to becoming a good writer. A season professional in any trade learns by doing. That's where the internet comes into play for a writer. There a numerous forums that cater to writers. Many have areas where a writer can post samples of there projects and receive critiques. Weaknesses are pointed out and you will soon realize that there is more to creating a good novel than just stringing words together.
I will address specific areas where noobie writers tend to faulter in upcoming posts.
Until then, I can recommend www.litopia.com and www.absolutewrite.com as resectable writer's forums to visit.
Do not dispair. If writing is fun for you, the weaknesses can be overcome, the prose can be polished. The one thing that can not be taught is the love of writing, the fun in putting a story down on paper or an electronic document.