Documentation for lgi

I have been using lgi for one of my projects, and it has been incredibly difficult for me to wrap my head around it. There aren't any documents for it, and the only way for me to make a program with lgi that uses dbus, is to look at other people's code, and Gio documents that are authored for C, then write my own code, and make it work with a lot of trial and error. Is there any better way to to do this? Any time a GLib.Variant value is returned, I have to fiddle around with it for a long time, and then finally find out what value it actually stored. I'm amazed that there isn't any documentation for the simplest operations with lgi and dbus.

Start by identifying the simplest lgi and D-Bus operations described in the issue, including how GLib.Variant values are inspected and used. Review relevant lgi usage and Gio-for-C examples, then document equivalent Lua workflows. Done means newcomers can perform these operations without relying on trial and error.