Learn the very basic line dancing step, the grapevine. Start out with your feet together. Hands can be used as needed for balancing.
Step with your right foot to the right side, cross your left foot behind the right and step, and step your right foot to the right side again. Then stomp with your left foot and clap.
Repeat the grapevine to the left side. Step to the left with your left foot, cross behind it with your right foot, and step to the left with your left foot again. Stomp with your right foot and clap.
Practice hitch steps by lifting a leg up with the knee bent so that your thigh is parallel with the floor.
Add in some scuffs with your feet. Do this by putting all your weight on one foot. Swing the other foot in front of the first foot and let your heel scuff the floor in front of you.
Master the movement called the twist. Do this by going on the balls of your feet and moving your hips and torso back and forth. This causes your body to twist.
Practice doing all these dance moves in sequence, smoothly transferring between each movement. Try to do them a little faster once you are comfortable with the movements.
Put on line dancing music and put together all the movements you learned to the beats of the music. The speed of the dance will probably be very quick.