For beginners, when they find a quiet and comfortable place, they must find another suitable chair. Because meditation and sleeping are different, their physiological reactions are different, but in order to prevent falling asleep, it is best to find a chair with a straight back, which can help you straighten your waist and support your back and head.
Then sit in a chair, with your butt on the back of the chair, your feet slightly stretched forward, beyond your knees, and your hands on the armrests or knees to relax your muscles as much as possible. Close your eyes. Meditate "1" in your mind when inhaling and "2" when exhaling. Do not deliberately control or change the breathing frequency. Inhale and exhale regularly. This lasted for 20 minutes. Usually there is no problem in the process of sitting, but if you feel uncomfortable or dizzy, or hallucinate, just open your eyes and stop sitting. However, these situations are rare.