You don't have to finish the book when you send your query/proposal.
I have a few very helpful links that I've found in the last several days that you might want to read if you're seriously interested in making writing a career.
http://jamesrussellpublishing.biz/queryletterbk.html <-- Sample of a query letter
http://www.katfeete.net/writing/agents.html <-- Extensive list on literary agents
http://jakonrath.blogspot.com/2010/0...on-ebooks.html <-- Article on whether you should use a traditional publisher or make it an e-book
http://us.macmillan.com/Content.aspx...30_lblQuestion <-- An example of a big publisher and what they want from you.
So, there's three things you can do:
*Send a query letter to a literary agent and wait for his/her response. This can take months. Everything in publishing takes months.
*Send a proposal directly to a publisher who accepts new authors without agents.
*Make your book an e-book on Amazon and smashwords.
So I'm sure you're wondering if you need a literary agent or not. It's really your call. If you can educate yourself on the industry and if you believe in yourself to get better deals without the help of someone who's been in the business for years if not decades, then great, you can skip the agent part. If you don't think you can do this on your own, then find an agent. Read the links I posted. You have to send a query to a literary agent with the relevant details to see if they're interested.
It can take 4-6 months for them to reply, usually.
People are saying these days that e-book authors are starting to break into the mainstream market since more and more people are getting Kindles/Nooks/smart phones, but the truth is only 15% of the market buys e-books. However, e-books give you 70% of what your book sells for, while traditional publisher normally only gives you 10-15%. Read the link I posted about ebooks for more on this.
As for how to get started, look what TOR publishing requires:
I'm planning on sending my package within the next week. I haven't finished the book completely, but my first three chapters are done and edited (and yes, by a professional editor) and I just have to complete a synopsis.
So yeah. If you want to be a writer.
Start writing. Writing will be the easy part.
Edit: And I just wanna say, from one guy who's trying to break into the giant publishing world to another... don't despair.
J.K. Rowling got rejected 7 times for Harry Potter and the Philosopher's Stone. Everyone gets rejected.
Also, every day that you write, you're going to go through a rollercoaster of self-praise and self-doubt.
10am: Man, my story is the shit.
11am: Man, my story is shit.
12pm: I don't think I have enough characters to make it seem like a real world.
1pm: I think I have too many characters.
2pm: The dialogue isn't real enough!
3pm: This story is so fucking good - I can't believe I didn't start writing sooner.
4pm: WHY AM I WASTING MY LIFE ON THIS SHIT
5pm: I think Guy A and Guy B are too alike and not unique enough.
6pm: Guy A and Guy B are unrealistic characters at opposite ends of the spectrum!
7pm: My romance is too much like Twilight.
8pm: I don't have enough instances to develop the romance!
9pm: The battles are too short.
10pm: The battles are too long and too many.
11pm: I hate this book.
12am: I love this book.
This is me everyday. You just have to push yourself to keep trudging on and on, through all the self-doubt. I've convinced myself:
there is no such thing as writer's block. Only laziness, and an unwillingness to think.