Introducing a kitten to another cat?

Well my kitten is now 2 years old and i have a older cat who's 16 years old and she didn't grow up around the younger cat and that's just how cats are, Your older cat probably needs to get used to your younger cat, Just let them Adapt on their own. Don't force them to get along it will take time but in the end they will become friends, Hope I helped! :) Good luck!!