D.M.
I potty trained at 3 yrs, I used 1 jelly bean for a successful pee and 2 jelly beans for a successful #2, I used to build in a routine with it, we always go pee before we leave the house, when we come home, first thing in the morning I change them out of their diaper and go pee then underwear, before we go outside in the back yard, before we take a bath, take a nap.
I used to sit them on at these times and then in between they had an accident they learned from it and then they were going to the bathroom more independently by the routine and when they had to go. I only did the jelly beans for 1 month as they just wanted mostly praise after awhile and we brushed their teeth really good that month especially, I also sang a made up Pee Potty song. to celebrate which they loved and made them feel more proud of themselves. Good luck. consistency, rewards and praise is really key.