A nice way to learn to ease your breath and keep form is to stick a small object like a cell phone or a pen between the pants and the belt so it is held by the tension of your normal breath and walk and do regular things for a while. Than you have one or more jump at you using surprise or if you can in a house from different places like under the stairs and the like. You know if the object falls that you changed your breath by reacting rather than choosing what to do. This is a simple example and i am sure you can find ways to make it more relevant for you.