picture of my toilet flange and the removal of the cap

Hi everyone, I am clearly a DIY and out of my element. I’ve watched some YouTube videos and it seemed simple enough which is to cut the cap of the toilet flange and then cut and chip at the remaining piece either inside our outside of your plumbing pvc pipe.

Problem: I did the first step but now I struggle to know what piece belongs to the flange or my plumbing pvc pipe since they are both black. Can someone please review the pictures and able to provide me with advice? Thanks so much