No you are not blind. The quarter panel is one panel that extends to the front quarter. In terms of difficulty, it was rather simple.
You do not need to paint the roof.
This is how you repair that spot.
Sand the damaged area down, make sure everything is flat. Apply your primer to the area and sand it back down ready for Colour.
Now get a scuffing pad and rub it along the WHOLE panel including the a pillar. This way you won't have any blend lines.
Apply Colour to the area and fan it out layer by later. 3-4 is enough. Get your clear and clear the whole panel and you are set. Let it cure and buff any imperfections.
Q