Hi,
She is probably not ready yet but if you insist, here are some tips that may help. I know of a few kids that have trained as early as 18month but it is rare. In my daycare the average age is about 2 1/2.
Stop wasting your money on pull-ups. They are no better than diapers. Take her to buy regular panties. When she wets it will send a clear message to her because it will run down her legs. I have never seen a kid not care about it.
Potty training off and on never works. She is either in training or she is not. If she is training, it means that she will need to be introduced to public restrooms also. In other words, if you are going to the store or out to eat, do not put her in a diaper for a few hours for convenience. As soon as you get to your destination, the first place you need to visit is the bathroom. That way, she will know that there is one available giving her no excuse to go in her pants.
Some (most in my experience) kids will not train on a potty chair. Put her on the regular toilet. Purchase an insert to make the hole smaller if she feels insecure. Supply a stool so that she can climb up on her own. Let her get her own toilet paper and teach her how to wipe herself. Let her try to pull up her own panties and offer assistance if she needs it. Let her flush the toilet when she is done and wave goodbye. Kids love to flush the toilet. Handwashing is next and should be a ritual by the way. Some kids like a handwashing song. The key here is to make going to the bathroom fun!
She might like this activity so much that she will drive you nuts, but hang in there. The initial excitement will wear off in time.
I would let her do all of the steps whether she is successful or not. Add something special when she is successful like a sticker or something. Give her a favorite treat for a successful poop!
Hold all liquids for at least an hour before bedtime. She will more than likely stay dry through the night. Get a plastic mattress liner for her bed just in case.
Good luck and don't worry. Eventually your daughter will potty train.
D.