Like agreed you can go on to develop a DotNet Core 2.2 solution which holds an introduction page for my project.
This solution should be able to be put "on top" of an existing Asp.Net Core/Razor portal, which should make the underlying screen darker but still visible, and on top of that, you develop the Intro, which needs to be fluent, nicely looking, and able to go back and forward.
The details were already spoken in our private conversation.
We will be developing this Intro, as well as a Quick Start, and a "User Manual" in the same way. This first milestone is for the Intro only, estimated by you on approximately 20 hours.