You can consider practicing Qigong by yourself and recommend intelligent Qigong. This is a kind of health qigong that not only knows what it is, but also knows why it is. It has a complete and effective theoretical system and method, and can learn a high level without the help of a master. Please search "Tong Ling Station" for details. The information on it is very complete. If you want to get started, please download Concise Intelligent Qigong first. From the point to the surface, you can hold your breath through the top, learn by yourself with three hearts, and practice your breath for three months. If your constitution is sensitive, you should feel angry soon by practicing the method of holding your breath.