L.S.
How do you get him to focus on potty training? You drop the whole potty thing and let it become his idea. He will come around. He is young and has made great progress. I don't think there's a kindergartener out there who went to school in diapers. I would just give the potty thing a rest for a while. The more you push, the more he'll push back. When he's really ready, it will happen very quickly.