she likes to chase after it but she isn’t really getting the whole bringing it back aspect of fetch
Repetition and patience. Don’t expect a cat to fetch like a dog. Cats have to do things their way and in their own sweet time. A curious cat is more likely to learn to fetch that one who isn’t.
I taught my cat to play fetch when he was over a year old. I wadded up a small piece of paper and tossed it at him. Then I reached out and pulled it back. I repeated this numerous times. Eventually, he batted it back to me. So I tossed out further, making sure he was watching (cats get bored easily), and waited. My cat is extremely curious. He couldn’t let that paper be that far out without checking it out. I told him to bring it back and I’d throw it again. After several days of doing this, he finally picked up the paper and brought it a few inches back. We continued this game for over a month, and each time he’d bring the paper closer and close to me until finally he got it within a few inches. It got so I could throw the paper into another room or around a corner and he’d go and bring it back… in his own sweet time, of course.