Ideal practice times are before dawn or before meals. A complete session typically ends with Mental Pranayama to still the mind. Progression:
(Diksha) from an authorized teacher to ensure the practices are done safely and correctly. Kriya Yoga International 144 kriya yoga techniques pdf
which outlines the 18 asanas and Kriya Kundalini Pranayama, or this overview document Official Babaji Kriya Yoga Site: This PDF thesis Ideal practice times are before dawn or before meals