Complex sentence: At the age of 9, Otero saw the Gloria Estefan Let It Loose Homecoming Concert in which she told her mom: "when I grow up, I want to do that!" and soon after Otero's dream of professionally pursuing music began.
Split into simpler sentences: At the age of 9, Otero saw the Gloria Estefan Let It Loose Homecoming Concert. She remarked to her mother: "When I grow up, I want to do that!" and soon after, Otero's dream of professionally pursuing music began.