Well, since you say you never played an AC game before then its the perfect to dive deep into City Folk since everything will be new to you.
BUT, I recommend renting it first.
Animal Crossing is NOT a typical game. Its a "life simulation" game in which YOU determine how the game progresses. You can design new patters and use them for clothes or for mural design, you can collect furniture and decorate your house however you want it, you can plant flowers, catch bugs, go fishing, dig for fossils, interact with your neighbors, participate in monthly events and, most importantly, share the experience with up to four people, locally or online.
So there's definitely a lot to do. But since there's no real goal I don't know if it will be your kind of thing so again I recommend renting it, playing it for an hour or so and then decide if you want to explore further.
