Using your Merida Scultura 300 is a breeze. Just hop on, adjust the seat and handlebars to your comfort, and start pedaling. When riding, use the disc or rim brakes as needed to slow down or stop. In wet conditions, rely on the disc brakes for consistent stopping power. As for maintenance, regularly check the tire pressure to ensure a smooth ride. Clean the frame with a mild soap and water after each ride, especially if you've been in dirty or wet conditions. Keep the chain lubricated to prevent wear and ensure smooth gear shifting. Also, have your bike serviced by a professional at least once a year to catch any potential issues early.