how did she begin her career?
They formed the band Selena y Los Dinos and began promoting it.
Selena
 Jr. opened his first Tex-Mex restaurant, Papa Gayo's, where Selena and her siblings Abraham III (on bass guitar) and Suzette Quintanilla (on drums) would often perform. The following year, the restaurant was forced to close after a recession caused by the 1980s oil glut. The family declared bankruptcy and were evicted from their home. They settled in Corpus Christi, Texas; Quintanilla, Jr. became manager of the newly formed band Selena y Los Dinos and began promoting it. They needed the money and played on street corners, weddings, quinceañeras, and fairs.
who played the mom in the movie selena UNANSWERABLE what is selena? She was an American singer, songwriter, spokesperson, model, actress, and fashion designer.
wiki:13482093
Selena [SEP] 1971–1988: Early life and career beginnings
Selena was discovered by musician Rick Trevino, founder of the Tejano Music Awards, where she won the Female Vocalist of the Year award in 1987 and for nine consecutive years after. The band was often turned down by Texas music venues because of the members' ages and because Selena was their lead singer. Her father was often told by promoters that Selena would never be successful because she was a woman in a genre historically dominated by men. By 1988, Selena had released five more LP records; "Alpha" (1986), "Munequito de Trapo" (1987), "And the Winner Is..." (1987), "Preciosa" (1988), and "Dulce Amor" (1988).