Evan probably won't do a lot of talking as he tries to acquaint himself with everything and everyone. He'll probably also be wearing his Hogwarts uniform robes he came to the village in because it's just a lot easier than trying to figure out what to wear. They're clean, so that's all that matters to him. I don't think he'd have eaten much at breakfast, and, if possible, in classes, he'd have tried to sit in the back or with his back to a wall and the door/windows in his eyesight out of habit.