First create a fishing pole and catch a raw fish.
Next find a cat, cats are only found in the xbox and PC version as of right now.
As soon as you spot one stand still until it approaches you, one slight move and it can get scared away.
Then feed it the raw fish until it sits down. Sometimes it doesn't work on your first try so keep trying.
Also if the cat doesn't approach you try to get closer.
Good luck in your life of minecraft😄