Just walked in on him/her eating

he's standing on the bottom of the cage munching on food, with one foot stuck up on the perch. Still hasn't perched, tweeted, fluttered, or anything like that, but I'm trying to be hopeful. Will research sicknesses tonight, but there are a few things that could have attributed to his daytime sleepiness. Last night I left the fish aquarium light on by his cage as his "night light" (as advised by various websites), and it was his first night in a strange home. The workers at Petco said he was new there, so maybe he hasn't figured out to use perches yet? And would be tired from traveling. How do I attach pictures? (sry very new here)