Tpr

In NC what are the laws in regard to a person adopting after a TPR?
Can a grandfather adopt? Is there an age limit for a family memeber? Could a close friend of the family adopt? Is there an age limit for that?

I know health issues can be a problem. Can age be a problem?

I may have my ex give up his rights or have the courts take them (he is a convicted sex offender) and my grandfather is willing to become the ‘father’ on paper but he is in his 80’s… He gets around great, uses a walker off and on and has some arthritis and thats it…

thanks for any help