I wish you luck and success with it. Writing a book and then everything after that is more of a challenge than I ever would have thought.
I wrote a book about my wife's motorcycling experiences and overcoming an accident that resulted in her left leg being paralyzed but then still getting back up and riding a motorcycle again after modifying her bike with an electric shifter. Writing the book took a while for me because I had to interview my wife, write the book in first-person, and then keep doing that to piece together the book. She'd get pissed and I'd have to quit talking about bikes for a while.
I found an editor that is not very expensive and he is really good about letting the author retain their story and writing style, as he mainly just checks for spelling, grammar, and continuity within the story. It took him about 5-6 weeks to edit our book (roughly 78,000 words - 290 pages). We are editing my second book, as I type this.
Publishing was interesting. After much thought and research, I went with Amazon/Kindle and their print-on-demand. It's much better than purchasing 500 copies and then having to store them yourself, or with some publishers, they stock your book and you pay them an annual "stocking fee".
The hardest part of it all is promoting. Many forums get really pissed if you post about something you have for sale but are not a "sponsor" and paying them money, many stores won't want to carry it, social media will only get you so far, and just getting the exposure and publicity is more work than you'd probably imagine. I know it is worse than I was expecting.
Anyway, drop me a message if you have any questions about what I went through and am going through with my books and I will give you any advice I may have. If you send me your email address, that will probably be the easiest way to contact me as I am only dropping in here about once every 1-3 weeks.
If you are interested, this is the book about my wife's motorcycling experiences...