Sure, there is already the KiCAD file including everything to play around with on your own; added a picture of the schematic here for a quick glance without downloading.

Hi, not sure if @Floca get his nodes working, but for me, the problem got fixed with this #define MY_RF69_IRQ_NUM MY_RF69_IRQ_PIN as mentioned by @mfalkvidd Thanks!

Project completed. It works. :)