Starting to potty train my almost 2 year old. He tells me pee or poop so I take him to the big boy potty(he doesn’t have any interest in the portable one, uses it as a toy box lol) and I bring him to the big potty with his seat and he sits there

And just ends up wanting down after a minute or 2 and tells me no when I say go pee..like he understands the concept, just doesn’t wanna do it. I’ve tried having no diaper on and he pees around the house and after he does it he comes to immediately tell me pee or poop and points at it.

Any tips ??