Charlotte started asking to go to the toilet at about 19 months. We put her on when she wanted and didn't force the issue. After 2 days at day care and noticing her nappies coming home weren't actually very wet, and having her keep asking to go to the toilet, we switched completely to knickers - day and night.

SO has had a few accidents at day care, none in public and none at home. She weed on the floor a few times lol but always took off her knickers.

By the time she was 23 months she was completely TTd, day and night. I now have the occasional wet bed overnight but only if she is waking frequently in the heat to drink.

She will let you know. I honestly don't know what all the fuss is about - she did all by herself! lmao But I have heard some horror stories.

She now refuses help to get o or off the toilet, goes, climbs up, even puts up the lid and puts her toilet seat on if it isn't already goes, wipes and hopes off Just can't do the wipe after poos lol

Point? - They are all different, but I don't think there is a "too early" so long as they understand the feeling when they need to go, before they go.
Good Luck!!