>>2284First and foremost, you need an audience to release your book to. There's a billion books on the market, and each one costs time and money to read. Most people will choose to invest that time and money into a book they're reasonably sure they'll enjoy. How does a reader know if he'll enjoy a book before he buys it? Maybe he stumbled upon a glowing review, maybe a friend reccommended it, if your daddy is rich maybe can get your publisher to market it really hard, but the surest way is if the reader recognizes the author as someone who's written a book he enjoyed before.
Thus, you'll have to put time into writing multiple decent books - and money into advertising them - in order to attract enough of those rare experimental readers for them to start reviewing your work and reccommending it to attract safer readers, who may in turn generate even more discussion to pull in an even wider audience. Lots of small time writers run blogs or youtube channels or mailing lists or whatever. This turns their core audience - once they attract one - into a group of people they can directly release new books to. If your new book is met with a wave of purchases, the algorithms on online book stores will proceed to give it more visibility, which in turn attracts more readers.
TL;DR you need connections with your consumers, and those connections will take years of time, effort, and money to build up even if your writing is good.