A lot of the comments here are so far over the edge of sanity for me. If folks want to believe you need to train for X years before learning breathing technique

A lot of the comments here are so far over the edge of sanity for me. If folks want to believe you need to train for X years before learning breathing techniques that is up to them, but no one is backing those claims up. If you are looking for a simple and not particularly woo woo guide to this breathing technique (and yoga in general) the yoga with adrienne Youtube channel is a great resource. In general, learning good breathing techniques and some basic yoga are the single best things you can do for net improvement of physical and mental health in my opinion. You can get many of the benefits of asana/insert type of yoga here without investing in expensive courses or devoting yourself to any non provable beliefs - which is also clearly my opinion.