S.
2 is still very early. If he is saying no then I would wait. The fact that he is showing interest and a bit of understanding is the first step. If he will sit on or stand in front of the potty with his clothes on and pretend that is also a good first step. Eventually he will pull his pants down (probably won't do anything) and again pretend to go. Great second step. From there he will eventually go in the potty. All of this may take 3, 6, 9 months you just don't know. All kids are different but generally 2 1/2 - 3 is about the time that MOST boys start to train especially if he is the first child without any older siblings to watch. Don't rush him. Don't put unnecessary stain or stress on either of you. He will use the potty at some point. Pee usually comes first poop second.
When you do train: Use thick Gerber cloth training pants. Use 2 pair at a time to help catch it all. They need to feel the accident and gain an understanding there is not another option - use the potty or wet my clothes. Take them potty every 30 to 45 minutes. Only use pull ups for, naps, car rides, and away from home. They will train 2 times as fast if you do it this way. Pull ups, while convenient, are a glorified diaper and allow them to go ahead and wet if they don't feel like using the potty. They have to learn wetting in the pants results in an uncomfortable nasty mess and not acceptable.
I have 3 VERY different children and they all 3 learned to potty in 1 weekend using this method. Remember that accidents happen and it is a learning process.
S.
mom of 2 girls (3&4 yrs old both trained at 2 1/2) 1 boy (6 yrs old trained at 3)
Child Development Specialist