Just my personal experience in TT'ing 2 very headstrong girls is let them take the lead. It saves a lot of angst and cleaning up! DD1 refused to sit on the potty. One day said she wanted to wear undies, I said you have to use the potty so she did. She had a couple of accidents and that was it. Same with night TT. She wanted to wear undies. I said she had to have 5 dry nights in a row and she did. Also probably has wet the bed less than a handful of times since then.

DD2 would have a meltdown at the mere sight of the potty so it was put away and ignored. The more we talked about it the more stubborn she got. So after ignoring it for a few weeks she decided she was ready. So out it came and she has been ever since. Probably one or two accidents. She now wants to night TT so she is on day 3 of her 5 dry night tally.