Hin Nisan was already training in Graqirin martial arts when it was discoverd as Force sensitive 3475 years before the battle of Yavin. His initial training was just shifting gears to adhere to the Jedi tenets. Nisan was always on guard. Not because of issues with the Jedi but he kept having simple flashes of memories that he swore, never happened. Although Graqirin martial arts taught him how to focus at an early age, He could not shake this feeling that imminent danger was always there.