Using the Wave Roller is a breeze. First, make sure your feet are firmly on the front paddle. Then, gently swing your body from left to right to start moving forward. You can control the direction with your feet too. When you want to stop, use the hand brake. As for safety, always wear proper protective gear like helmets and knee - pads. Also, make sure the area you're riding in is clear of obstacles. For maintenance, keep the wheels clean and check the steel frame and extensions regularly for any signs of wear. Don't overload the Wave Roller; the maximum weight it can handle is 60kg. And remember, it's meant for kids aged 4 and above.