Anatomy of anxiety, including goings-on in both the body and brain. Like most powerful states, anxiety is a total mind-body experience! --somehow, reading everything I can about how anxiety and panic work calms me.
Plain and simple, like any other skill there is no "fast" way to learn to play guitar. Learning any skill takes time and dedication. The best way to learn guitar "fast" is to dedicate as much time as you can to it and to get some good.