J.A.
Any potty you buy may scare him at first, just take it slow and easy. I bought each of my kids a potty chair and we started out going "potty" together, even before they knew how to actually perform in the pot. I would sit on my big potty and they would sit on their little potty, I think it helped a lot because they could see and hear what I was doing. When I first started, we only did this first thing in the morning, as soon as we woke up. Pretty soon they were joining me every time I went. As a matter of fact, they are 9 and 13 now and still follow me into the bathroom LOL.