Become reasonably fit. Practice walking on peg stilts first to develop your balance.
Start with slack rope first, which is a little looser than the tightrope. You will have to experiment to find out which tension works for you.
Set up your rope not more than 12 inches from the ground at first. You can always raise it as you become more accomplished.
Have someone help you up on the rope. Start in the middle first.
Look forward and not at your feet. Work on keeping your balance from your hips. Keep your arms out straight.
Avoid waiting for the rope to stop wobbling when you put one foot on the rope.
Keep your arms out and move them to keep your balance when you place your other foot on the rope.
Hold something in your hands to help you balance. Some slack rope walkers recommend juggling clubs.
Practice standing at first. When you are able to do so without wobbling too much, take a step, stand again, take a step, stand again, until you reach the end of the rope.
Find your footing first when walking on the rope, then place your foot (it is the opposite when walking on the ground). Keep your weight on your back leg when you stand on two legs.
Work on standing on one leg. You will actually find it simpler than standing on two legs, as you can use one leg to help you balance.
Learn to turn on the rope by having your right foot facing ahead on the rope, then place the left foot at right angles with the toes facing out. Shift your weight to your left foot, and swivel on the ball of your right foot. Put the weight on the right foot, and face the other direction. Do not look down at your feet.
Walk backwards on the rope. Remember not to look down.
Tighten and raise the rope gradually.