Character class

Hi! i need some orientation here, i want to make 2 playable characters:

1st character: Human
2nd character: Animal

Of course i have the human character ready since i started with a third person project but how could i create a new class in order to be able to use the animal character?

As an example, on the link above, you are able to play as the monster and that is what i want but instead of a monster i would use an animal.

Any help here? i was thinking in following this tutorial: - YouTube

But i dont know if that is what i’m looking for .