Probably the best advice I can give you about publishing is not to rush.
I’ve always promoted doing as much as you can yourself—especially since your first book is pretty much a loss until you write more and have more books available for purchase. When it’s when it’s your only book available, you’ll never get back what you put into it. (Unless you have a tangible way to measure pride and satisfaction.)
Combining the fact that this is your first book with doing it all on your own is dangerous. You’ll never be sure if your book bombed because you’re an unknown author and this is your first book, or if it’s because your book sucks. Publishing a superior product rather than a POS will take some of the guesswork out of the question.
You want to put your best work out there, so when you have more books available you don’t have to waste time fixing it. Being it is so easy to update files in Kindle Direct Publishing, you may get into the habit of updating your files and covers all the time. It’s a waste and you’ll never move forward. Fixing your files in CreateSpace is easy too, but your book isn’t available until your files are approved, and CreateSpace’s approval time is longer than KDP’s. People still can buy your Kindle book while the new file is being approved, but it will be your old file.
Here are some tips to not rush:
Cover
Never publish your first attempt at making a cover. Make many covers. Many, many, many. Try different pictures, fonts, and color themes. Take your best two or three and turn them into a contest on Facebook or Twitter. Enter all the names of the people who chose the one you decided to use into a drawing and give a signed copy of your book to the winner. Ask for lots of feedback. There are plenty of people online who are willing to give you an honest opinion.
Research your genre, watch picture manipulation videos to learn how to do what you want. If your idea is too much for you to do on your own, or you just can’t get your vision from your head onto the computer, ask for help. Don’t publish your first attempt. Keep it clean, keep it professional. One day you may change your cover to bump up sales, or because your skills have improved, or because you found a better picture. All I’m saying is, don’t make it a habit. You’re supposed to be writing more books.
Formatting/Book Interior
The inside of your book needn’t change much. As you grow your library you may want to add those books to a list in the front or back matter letting your reader know they are available. Maybe you’ll want to fix typos, but don’t get caught up with this. You’ll never stop editing, and I feel it’s disrespectful to the people who previously bought your book before your fixes.
CreateSpace takes 12-24 hours to approve files, and your book is not available during the approval process. You can lose sales going into it to fix to too many times.
KDP takes five hours, but don’t use this as an excuse to fix every little thing. Plus you want your paperback and Kindle files to match. Publishing your book as close to perfect as possible will save you lots of time in the long run.
Blurb
Changing your book’s description is simple enough, but if you offer a paperback you’ll want your product information to match the blurb on the back of your book. Again, CS has to approve any changes and this takes time. Blurb writing is difficult, every writer loathes it. I find it easier to write blurbs for others than for my own books. Research how to write one and get plenty of feedback from people who both have and have not read your book. The people who have read it can tell you if it’s accurate. The people who have not read your book can tell you if the blurb makes them want to read it.
Editing
I’ve written a lot about editing in my publishing series, and in two prior blog posts. Editing is the worst because of all the waiting, waiting, waiting. For other people. To read your work. You’re waiting on someone (or hopefully many someones) to read your work and you can’t say anything or you’ll seem rude. If you pay someone, hopefully, you come to some kind of a time agreement. If your friends are doing you a favor, you need to be patient. I’ve edited for people who have published before I was done. Please don’t do that—especially if they keep you updated and they are finding things. It’s rude, and frankly, it hurt my feelings. What I advise you to do is forget about publishing it. Work on something new. Work on your cover—can you make it better? Work on your website, or write a few blog posts and schedule them out so you’re ahead. Try to get into a blog tour, or ask some of your friends who run blogs to interview you. Beta-read or edit for someone else. There are plenty of ways to fill your time and still feel like you are moving forward career-wise.
Be patient.
Don’t rush into publishing. It will save you a lot of time down the road, and a lot of regrets, because you’ll never now how many sales you lost because of a poor cover, or your first 20% in the Look Inside feature has typos in it and a potential reader didn’t want to take a chance on the rest of your book.
It took a year or more to write your book. Waiting a bit longer won’t hurt.
What’s your biggest publishing regret?