Keltham's very weirdly augmented social-presentation skills are telling him that he's screwing up, faster than they're telling him how to fix it; the problem isn't in his body's execution of the orders his mind is sending, it's that his mind is sending awful orders. Ione may be acting interested for the sake of this skit, but in real life, well, he's not sure because everybody here is sort of hard to read, but in real life, Ione probably wouldn't be interested in the Roguish Gentleman Template he picked up from some of his own previous larping? Even if that Roguish Gentleman Template was being perfectly executed, and even if it didn't come across as a weird dath ilani trope that may not even exist here? Even if he's learning, he's probably learning the wrong thing right now.
Keltham is used to this feeling. He knows that learning a new art often feels like screwing up, or even meta-screwing-up the process of learning. It doesn't occur to him to be embarrassed about that happening in public, he clearly said that he was going into a learning and practice mode; like, how would people here even know how to read if they'd never learned and practiced anything in the presence of another human being.
"This scenario isn't working for me, can we switch again?" Keltham says, with more calm and confidence than that statement even warranted.