Introduce Yourself : Young acting senior whose stengths are comedy and singing by Jetta Linda Ostrofsky

Hi, I was on Americas Got Talent (dancing/sang with Howard Stern) & The Xfactor (sang to Simon Cowell). Can see it on Youtube.com and enter "jetta linda ostrofsky". I would like to be in a Comedy and/or Singing commercial. I live in Sacramento, CA, let me know if you have any ideas how I would do this. Thanks