+1 about cats adopting you.
As for the claws, we have 4 cats inside. I trim their's about every 2 weeks. It doesn't make them scratch any less, just do less damage. Carpeted bass cabs are scratch and cat hair magnets, so tolex is a must now. There's no need to spring for the animal specific nail trimmers as the human animal ones work just fine. Start them young and you get them used to it. I would say train, but I know better when it comes to cats. I hope you enjoy your new friend. I was a dog person then got a cat when I was teenager. I've had atleast one ever since.