N.W.
I agree with Kat, just put away the diapers and go for it! He is ready by everything you tell us, so expect some messes at first, but it will be over with before you know it! I would take him to pick out some underwear that he likes with favorite characters and such to make it more fun for him to wear. Just be upbeat and encouraging and he will get it! Don't even mess with the pull ups, they are glorified diapers and prolong a fairly simple process. Good Luck!