Out of all the yogic poses the sirsha asana or head stand is the king of all asans (poses). It is also the most advanced and difficult. Ancient seers laid great stress on this asana as it was also supposed to lead to nirvana -eternal bliss. I will caution a beginner who wishes to perfect this pose. Firstly a degree of physical fitness is essential to do this pose. I will recommend that to learn this pose it is best to consult a certified yoga instructor or join a Yoga school. In the 21st century the western world has realized the benefits of Yoga and a lot many teachers and schools are available to teach Yoga.