There isn’t any configuration beyond setting a default post status; you just download and activate. You may need to install the IndieAuth plugin to log in to them, but then you should be able to use any of the many Micropub clients to post to your website. I recommend starting with Quill.
More details and some examples discussed here: https://wordpress.tv/2019/06/26/chris-aldrich-micropub-and-wordpress-custom-posting-applications/