Using the Pimoroni Display - O - Tron 3000 is easy. First, connect it to your Raspberry Pi (it works with models B+, B, A+, and A). Then, use the included Pimoroni Python support to start programming it. You can use the 4 - direction joystick with the push button for navigation and the 9 - segment bar - graph for showing indicators. For the RGB backlights, you can adjust the colors to suit your style. When it comes to maintenance, keep it in a clean and dry place. Avoid exposing it to extreme temperatures or moisture. If you run into any issues, refer to the Pimoroni Python documentation for help.