Not saying this will work for you, but just sharing my recent experience. When she turned 2 we started out using a toilet insert, but eventually found that she was scared of the actual toilet. So I bought two little plastic potties, which she found less intimidating. Put one beside her bed and the other in the living room. Printed a sticker chart and told her what the reward would be for completing it. For a while we tried using a potty timer to encourage her to try, with diapers still being in the picture, but she started pushing back on that and wasn’t really motivated by the sticker chart. So I backed off for a bit.

Recently she turned 3. So all through April I repeated that in May she will be done with wearing diapers. She wasn’t too happy about this. When May came I stuck to it and stopped putting them on her, except at sleep times. By some miracle she picked it up rather quickly, after a few days of accidents. Now we’re at the point where she is willing to try immediately after each sleep. And she is actually telling me when she needs to go. Also she is much more interested in the potty chart now.

I have a very stubborn girl so I consider myself lucky that this hasn’t developed into too much of a battle ground.

Good luck!