Starting a lawn mower can seem like a daunting task, but it doesn't have to be. First, make sure that the key is in the "on" position and that the fuel shut-off valve is in the "open" position. Then, push the mower to a level area and turn it so that the front wheels are facing away from you. Finally, grip the starter handle with one hand and pull it sharply towards you. The engine should start after a few tries. If it doesn't, check the fuel line to make sure there's gas flowing to the engine, and then try again. With a little patience, you'll be able to get your lawn mower started in no time.