I'm actually planning on publishing a handful of books. I recommend dong a decent amount of exploration on the topic to build a strong base of knowledge... Research self-publishing, and all of its basic tasks. You may or may not be able to have your manuscript accepted somewhere by a publisher but you're basically looking for someone to take your work and make most of the money (and that's if it strikes someone's fancy, but they aren't a respresentative of the general public, most likely). In some cases you may have to do the same amount of self-promotion as if you were published by one of the big time publishers.
Don't be afraid to edit an get rid of parts that don't work well. But try to keep old versions in case you realize you got rid of something good.
Have people you trust to give you feedback. Join a writing group (maybe at a library or something) or take a class; taking a class is helpful when possible because it gives you structure and easy access to feedback.
Good luck