Toilet-training my toddler: When to start?

It is time to toilet train your daughter at 20 months. Infact, they gain bladder control around this age. You can buy pull ups that helps train the baby. Begin at home. You can keep track of how frequent,your baby wants to urinate. Then take her every time everyday at the same time. If you child is not speaking, you must use a word to assosciate with that and soon your child may try to mention it. Buy potty for her. It is also a good idea to teach them sign language.

If you are keen to try now then allow her to run around with no underwear on for now and keep a potty close by this is the first step to potty training but i would think at 20 months it might be a while before she safely uses the potty with no help.
She might not be ready neither of my girls were at 20 months and they both potty trained at about 2 and half years in the end with no problems as by then they knew exactly what they were doing and could talk to me.
I would just introduce the potty and generally keep it light and stop if she is becoming unhappy she will soon let you know if she is not actually ready and then if she isnt i would put it off for another month and try again
good luck

I actually started potty training my son at 17 months, since it was so obvious when he would poop. I figured, if I could at least get him to go in the potty for just that, and save a diaper or two I would be happy. Well, he took to it very well and would tell me most of the time when he needed to go. I actually had been using sign language with my son since he was an infant and taught him the sign for 'potty' which is an easy sign for toddlers. He learned the sign in a day and would use it to let me know he needed to go. So for us, I got a little potty, one that you can take the seat off and use the seat on the big potty if you like. I let him play with the little potty before trying to get him to use it, just so it was familiar. My son actually likes to sit on the big potty instead of the little potty, but sometimes he changes his preferences. I didn't change him into pull-ups until about two months ago, and I like using the pull-ups better than diapers. Especially if you are out and about, it is much easier to use the pull-ups in a bathroom stall than to try to put on a diaper with them standing up.
Hope that helps! Good luck!

the old potty training age was 18 months to 2 1/2 years before the invent of disposables,now it is much older as the diapers and pull-ups keep the child to dry.
As your daughter is showing the signs,I would try buying a few pair of the 5 ply or better cloth training pants and have a number of pair of plastic panties to put over them when going out.
The naked method as mentioned,is a good starting point at home,let her run around the house naked for a couple of hours each day( when you have some time to watch her).
Let her know that the pull-ups or diapers are for night & nap time only.
She is already starting to tell you when she needs to go,it is just that her timing is off,that is where the naked method will help.
I hope this helps.