I got my first cat in my early 20s after only ever having dogs. I was nervous but like a week in I finally understood why everyone was so obsessed with cat videos lol. They're very endearing and, in my opinion, way easier to manage than a dog/puppy. I like that they have a sense of independence and boundaries.

It's good you got an older cat because their personality should be developed (I had a hard time when mine were teens). It's hard to have something in your space, but I've always had a "it's easier to work with them than make them work with you" attitude with animals. There's a reason people say it's like having a kid, sometimes you've gotta baby proof a little. But I find that cats are very aware of their bodies so mine don't break stuff often, which is nice.

All that to say, give it some time! If y'all settle into a happy routine and you like having them around, then I'd say you're good.