Now many countries offer services for the development of this ancient art but you need to select a yoga instructor with experience. Video recording may help you but it involves relying upon equipment and this act is advised to perform in a more silent or peaceful surroundings.
Perform cleansing of your body before starting it. Select the appropriate way for you, start with the simple steps.
Do not rush immediately to learn complex asanas (steps). After practicing it over a month, study the basic complex asanas, joint exercises, yogic breathing and kriya (cleansing the body through breathing and physical methods).