As an author/writer, having a large social media, does not mean that you are a best selling author.
Does not mean your book is an excellent read.
As for myself, I do not have a large following.
I do not have celebrity status, in which my book would sell overnight and become a blockbuster movie. I am a author/writer that believe in my writing and the passion for telling a story.
All authors/writers believe that their own book is the best thing that have ever been published.
Great news!
You should believe that your book is #1 best seller; because you have something to share. Even if your book touches one person; your a best seller.