Get grounded in the fundamentals. Know the cautions. Get specific on how the breath relates to wellness and emotions. Study how breath can be inhibited and characteristics of natural breathing. Go deep into multiple foundational practices that are key to master before attempting formal pranayama. Get clear on clavicular, thoracic and diaphragmatic breathing.
Understand the parts of the breath cycle, what is necessary for safely teaching kumbhaka and which practices serve different energetic purposes. Then go deep into the techniques, and review clear instructions.
Consider pranayama from the perspective of the 8 limbs, as a yogic technique to manage prana. Study how chakras, nadis and prana vayus relate in yoga's subtle body anatomy.
Study the physical process of breathing. Review the role of primary respiratory muscles and accessory muscles. Get clear on the nervous system and go deep into the underlying processes of stress and relaxation, and yoga's impact.