Complex sentence: Khan's parents opposed to his joining films due to their own experiences, wishing that he would instead pursue a "steady" career of an engineer or doctor, and thus the shooting schedule of "Paranoia" was a clandestine one.
Split into simpler sentences: Khan's parents did not want him to make films, wishing that he would instead pursue a "steady" career as an engineer or doctor. For that reason, the shooting schedule of "Paranoia" was a clandestine one.