Same boat. I chatted w tesla customer service and they said that the car "needs to calibrate" and FSD won't be available until the car has done ~50 miles or so of driving after the download.
Off to drive!
I've seen plenty of sources for replacing the interior LED lights in the MY. And there exist color-changing LED lights. But all of the kits for the MY I've seen force a color choice. Anyone know of cabin light replacements that allow color change?