What about Fear of water? Phobias: xenophobia definition is a bit simplistic; yes 'strangers' but also more towards the fear of foreigners. Usually, used socially and culturally than just 'strangers' but I digress.
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.