Complex sentence: At the age of eighteen she by recommendation got to meet music producer Jörgen Elofsson to record a demo, he liked her voice to the point of starting to work with her and help her with her music.
Split into simpler sentences: At the age of eighteen she, by recommendation, got to meet music producer Jörgen Elofsson to record a demo. He really liked her voice, and he started to work with her and help her with her music.