First I am just curious why you are in such a rush to start? If you can answer yes to these questions than He is ready...Does he tell you when he has to go, does he want his wet or soiled diaper changed, does he understand what wet and dry mean, does he stay dry for at least 2 hours during the day, is he dry when he wakes up...maybe your two year old is different than mine, my little guy turned 2 in June and I can't answer yes to any but maybe one of those questions. If you push him before he is ready it will backfire, potty training is not when you are ready, it is when the child is ready, that being said all kids are different I have known 18 month old girls that were completely potty trained, but that is the exception. My oldest son took two weeks to potty train and it was a snap( he was 2 ), my daughter was nearly 3 before she mastered potty training. Whatever you do make it a positive experience, make the attempt last between 5 to 10 minutes at the longest ( I kept a basket of books nearby) take him in every 20 to 30 minutes to try, load him up on beverages nothing helps teach him how to go potty than actually getting him to go potty on the chair, even if at first it is just luck or chance! Praise trying, go over board crazy with praise when he makes a potty where he is supposed to, and don't shame accidents.
Patience, optimism, consistancy and praise...also I totally do not believe in pull ups to a kid pull ups are no different than a diaper, if you are commited to potty training and he is ready transition to big boy under wear
( well not at night or nap time until you have met with success) but definitely during the day...and anyone who tells you that you can potty train in a day is in my opinion either Very lucky or crazy...good luck to you, I know it is coming up on the horizen for us again ( will be my third go round with potty training) I wish I could say I was looking forward to it!
B.