S.P.
I agree with Theresa, my son showed no interest in potty trainging till he was almost three. When he finally did want to use the potty, I set aside one day where we stayed home all day. I put regular underwear on him and the potty in the livingroom. I kept asking him if he had to pee every 20 minutes or so. The first time, he wet himself without using the potty. The 2nd time, he used the potty but did not pull his underwear down. And the 3rd time, he used the potty and
pulled his own underwear down! That day I told him that I threw his diapers away and he was fine with it. Not sure if that will work for you, I just thought I'd share what I did.
The sharing thing will eventually come, just be patient.
Good luck and God bless!