First you need to polish and polish and polish your draft(s) over and over and over until they are of the highest quality of prose,story, grammar and spelling you are capable of. Have other people, who are not family or freind look them over.A local writing circle is a good choice. Polish and polish some more.
THEN figure out what KIND of publishing you want to do.
There are several options.
You can "publish" your work on a blog/twitter/yelp, and get "followers" or whatever.
You can certainly "publish" your work on a writers/story archive website fanfic.net wattpad.com etc etc etc.
You can certainly "publish" an ebook through Amazon.
You can certainly pay a vanity publisher or even Office Depot to "publish" your work (this is largely considered a BAD IDEA© Yogs Law and what-not. )
You can submit work to contests and magazines and get them "published"
You can go the traditional route and submit to Literary Agents, hopefully eventually get accepted by one, the Agent will then represent you to Publishing Houses and get you a contract and get published nationally. **This is the only one that will really get you into national bookstore chains.**
You need to get a current copy of "Writers Market" and then study it carefully. Agents have specific requirements for submissions and failing to follow them to the letter earns your manuscript a trip to the dumpster or a return to you unopened.
At a minimum it will need to be a printed copy ^^
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>Okay so how do you contact them?
Writer's Market
>Is it any different if you're trying to make it an ebook?
An Amazon ebook generally only requires being a .PDF file to submit or whatever. Your formatting can still be terribad and your spelling and grammar:abyssal.
>How do you make your book look presentable for the publishers?
Generally the Agent section of Writers Market will give you specifics on page size, spacing, font, point size, margins and what-not as part of the submission requirments. DO NOT DEVIATE.
>Like how do you make it look like an actual book?
There are many online guides and ebook vendors and vanity publishers may have individual requirements. Your Agent may have requirements of your draft for the Editor.
How do you make a hardcover?)
See above.
PAYING a publisher or Agent are Very Bad Ideas.