Setup guide?

Is there a step by step setup guide? I’m not quite sure how to configure it. I’m trying to install on godaddy with a Linux hosting account. I have multiple domains hosted on that account all running wordpress installation . Do I install this plugin on each website? If so, what info should I put in the “Home directory of your server” section on the basic settings. If there is a support email, I’m happy to pay for help getting this started because it will save a ton of money and time!