This is the official documentation, that explains how to install it both in a project created from scratch and converting a built-in project: https://docs.unity3d.com/6000.0/Documentation/Manual/urp/InstallingAndConfiguringURP.html
Viewing post in Easy Wireframe Shader Unity URP comments
There is a selection of types of projects and sometimes people start a new one with the built in pipeline.
A really quick test you could do is to create a blank URP project and import the package.
I hope that helped. If you still have any issues just leave me a comment here that I answer as soon as I can 😀