instructions for use?

I have been struggling with this plugin all day. There appears to be no information at all to set it up, and use it. I created a newsletter, and an autoresponder, but I can’t get much further. Nodesman tells me that it can do what I need, but I cannot figure out how. If there were a “pro”, supported version, I would be interested, or I would pay someone to guide me through this, but without some input, I can’t go any further
Any guidance will be greatly appreciated.

https://www.ads-software.com/plugins/wp-responder-email-autoresponder-and-newsletter-plugin/