Would a development related question be ok?

I'm trying to develop a system application for Ubuntu Touch, but between my little experience with the technologies (Qt, C++, D-Bus, Lomiri ...) and the peculiar architecture, I am a bit lost.

The app communicates with Ofono though the system bus, that part is more or less done and running fine on a PC, but now I have to communicate with the GUI, and I don't have a clear picture of how this should be done, especially so that it feels "integrated" with the system.

I would like to know if there is any core application that follows a similar schema that I could take as a reference, or the go-to tutorial for core system development.

Best regards.