The most important first step is: Don't lose hope.
You're dealing with the remnants of a mess left behind by a bunch of crusading zealots who were allowed do whatever damage they chose to inflict.
Unfortunately, CASA's corporate competence and integrity in cleaning up the mess is being tested. I strongly urge you to contact the
Colour Vision Deficient Pilots Association as soon as practicable. And join.
(Declaration of interests: I am not a CVD pilot and am not a member of the CVDPA. I just don't like it when zealots are left to destroy lives and careers on the basis of their beliefs rather than science.)