If you are a qigong beginner, I recommend that you do not start this training on your own. Nei dan qigong is hard to understand and experience, especially for qigong beginners. If you do not understand the training theory and practice incorrectly, you may injure yourself. Wai dan standing meditation is generally much safer. You should wait until you understand qigong and this training fairly well before you start the practice on your own. The following is for your information.
Nei Dan Sitting Meditation
Tai Chi Qigong by Jwing-Ming Yang (Ebook) - Read free for 30 days
Nei Dan – Internal Alchemy – Sacred Path Medicine
Why Meditation is Important in Martial Arts
The Essence of Tai Chi Chi Kung - Yang Jwing-Ming
Shengtai - Wikipedia
Nei Gong Archives - Singing Dragon and Handspring Blog
Common Sensations Experienced in Still Meditation
What Is Chi, PDF, Qigong
Blog – Yu Xian Pai Daoist School
Neidan ☯️ Taoist Inner Alchemy Meditation
Daoist Meditation eBook by Wu Jyh Cherng - EPUB Book
Qigong Treatment, Techniques, Benefits, and Uses