I really do not understand how to make this a project template. I wish these so called easy renpy GUI projects were described better. Theres barely any explanation, and the explanation that is there assumes that the person has experience coding. So frustrating.
Viewing post in 8.2 Update + Template projects comments
You only need to put it inside your Ren'Py project folder. Then, when you create a new project, the launcher will ask if you want to use a template or not. https://www.renpy.org/doc/html/template_projects.html
All the functionality is already included so it works as a template; all you have to do is unzip it in your projects folder such that it looks like any other project.
This template is not a tutorial - it's for people who want to try their hand at customizing their projects beyond the reskinning the default project offers. I do have a website for tutorials if that's what you're looking for: https://feniksdev.com/navigation/