I'm just a beginner at this toilet learning thing. But...
Last week we were at a baby store and Tate decided he wanted this thing for the toilet. He has never even wee-d on the toilet or in a potty before. So who am I to argue? We get it home and Daddy sets it up.... and Tate ends up doing 4 wees on it that night!
Now this apparatus might be suitable for your dd. It converts from a potty to steps up to the toilet, you can keep the potty part in the seat while its on the toilet or take it out so the wee goes straight into the water.
Am I making any sense? I will find a link

easier
its a bit like
THIS
oh, here it is!!
Toilet Trainer