Hey, I have experience with a lot of breathing exercises for over the last months. I have also read multiple books about different kinds of breathwork. I definitely recommend the Wim Hof Method, and other forms of Alkaline breathing. Here are a couple of links. Please consider giving it a chance. Wim Hof: The one I do when I wake up: With the WHM I started feeling it since two sessions. The effect is hard to tell in words. Just try it.