Success rides on considerably more than the simple physical ability to use the potty. There is a level of emotional willingness and motivation – a maturing of the child's impulsiveness and distractability – that really must happen before the child can complete this developmental step, which will be a satisfying source of pride once he is ready to make it.
Your son will start to let you know when he is mature enough. He'll show more interest himself, ask more questions, want to prove his new ability. Earlier attempts at training very often results in regression when the full size of the obligation hits the child. Three or older is not unusual for kids, especially boys, to thoroughly want to be out of messy diapers and into big-kid undies.
Before then, it is more likely to become a source of anxiety, frustration, and resistance. If I were in your situation, I think I'd be inclined to wait for the child's cues. He won't be confused if you simply let him stay in diapers for awhile, and when he's fully ready, he won't need your constant reminders to go, so life will be easier for both of you. And when he's ready, he won't need rewards, either, though a celebration might be in order.
Potty training is as natural, and as desirable for the child, as learning to walk and talk.
