I found this NEW Leica Q3 (Part 1) Tutorial | All you need to know very helpful.
There are A LOT of settings in the Leica Q3 and it's going to take me a long time to figure them all out.
One thing that I found helpful was to SELECT the 'Connect to app' selection when first setting up your camera. It automatically sets up a few settings including time, date, and time zone, so you don't have to do it manually with the camera.
It also gets you to learn how to connect the FOTOS app.
You scan the QR code for your camera in the app and the camera information is shared with the app. It connects using WiFi. The camera's WiFi network name and password are preset and can be changed in the camera menu.