If you are going to write your first book, here is some advice on how to get started.
First and foremost, don't procrastinate.
So then, look around for all information on the how to on book publishing; as in, where to go, editors, publishers, etc.
Go to book stores; they have information about publishers, editors and authors. These will give you information on how to.
Then, your book is dependent on your manuscript (the content of your book). Write your manuscript as error free as possible and when you are done and satisfied that; that is what you want to submit for publishing; do your word count; this will determine your publishing cost.
Then, find or choose a publisher. These are plenty all around. Choose one that will do a very good job, but at favorable cost.
Before you submit your manuscript; have it well edited. Start with a couple of friends; 3- 5 at least. After this, from their work, compile a final manuscript, then submit it to the editor/s.
After editing, carefully and PATIENTLY proofread your edited work, then submit it for publishing.
Most publishers re-edit manuscript