Sorry, tantric qigong is different from ordinary qigong. This is a kind of qigong. You must convert to the guru and then be enlightened by the guru before you can practice. This is because the pulse involved is not quite the same as that of the ordinary Qijing Eight Pulse and the twelve meridians. And blindly practicing will make mistakes, so you must have the guidance of a Taoist priest to avoid making mistakes.
Practice Tai Ji Chuan, and you are less likely to make mistakes.