Complex sentence: Gomez began her career starring the children's television series "Barney & Friends", later rising to fame for playing the lead role of Alex Russo in the Disney Channel series "Wizards of Waverly Place" (2007--2012).
Split into simpler sentences: Gomez began her career starring in the children's television series "Barney & Friends". She rose to fame playing the lead role of Alex Russo in the Disney Channel series "Wizards of Waverly Place" (2007--2012).