Complex sentence: Inspired by the playing of Sonny Boy Williamson I, Mayweather was mainly self-taught on the rudiments of the instrument; although upon relocation to Chicago, Illinois, in September 1949, aged 20, he befriended Little Walter.
Split into simpler sentences: Inspired by the playing of Sonny Boy Williamson I, Mayweather mainly taught himself the rudiments of the instrument. Upon his relocation to Chicago, Illinois, in September 1949, aged 20, he befriended Little Walter.