Use the emotions and energy to motivate your education. Remember how you feel does not make the water quality any better ot undo the past. It is what you do (or don't don) that gives the koi the home they need.
Jim was "spot on" in joining a koi club. There is the ZNA club in the DC area. You are also sitting in the middle of MAKC terriitory.
Go to the ZNA show John referenced. The last weekend of September, go to Koi America. Koi America is hosted by MAKC and is the largest show on the east coast.
You should consider reading at least the first 4 books on this list:
Reference Material On Nishikigoi And Nishikigoi Ponds - KoiShack