How to set up the 'pay with a like' plugin?

Hi there, could you please help with setting up my 'pay with a like' plugin, I'm new to wordpress and would like to promote my newly published book by giving away the first 9 chapters with the pay with a like plugin, but I can't find any simple instructions on how to do it anywhere on your site or on Youtube, could you also explain to me in simple terms, how the plugin works. Because what I want, for example is a picture of the cover of my novel, a brief blurb about what the story is about, and when people click the like button they get to download the first 9 chapters of my book, please can someone help me, I am frustrated because I don't know how to do code on Wordpress and just want to set up this plugin, thank you kind regards Renee Spyrou