Using PiJack is a breeze. First, find the GPIO header on your Raspberry Pi Zero. Gently attach PiJack to this header. Then, use a standard Ethernet cable to connect PiJack to your home or office network through the RJ45 connector. You don't need to install any special software or drivers. Once you plug it in, it should work right away with Raspbian. Keep in mind that the Pi Zero and Ethernet cable are not included in the package, so you'll need to get them separately. As for maintenance, make sure to keep PiJack in a dry and clean place. Avoid touching the components with dirty hands as it might cause damage. If you notice any issues with the LEDs not blinking correctly or the Ethernet connection not working, double - check the connections first. If the problem persists, you can reach out to the manufacturer for support.