Using your Sirrus X 2.0 is a breeze. Just hop on and start pedaling. Adjust the gears according to the terrain you're on - use lower gears for uphill climbs and higher gears for flat or downhill sections. When it comes to braking, simply squeeze the brake levers gently for normal stops and a bit harder for sudden stops. As for maintenance, keep the chain clean and lubricated regularly. Check the tire pressure before each ride; the recommended pressure is usually on the side of the tires. Also, inspect the brakes and gears periodically for any signs of wear. If you notice any issues, it's best to take it to a professional bike mechanic. Avoid riding in extremely wet or muddy conditions for long periods as it can damage the components.