Read this short bit on tongue position for qigong exercises. It is important to get the maximum benefit from energy flow. The devil is in the details, as they say. Pay attention to details and you get more benefit out of qigong exercise.
Ever since I started doing Qigong Meditation, I have noticed a significant improvement in my mood, ability to de-escalate during an argument with my students, and a calmer demeanor in public. It is literally the best thing that has ever happened to me.