@rush99999 The setting is not one that already exists. This will be a world of my (and yours through your character backstories) own creation. It'll be similar to the Forgotten Realms and Dragonlance.
@The Harbinger of Ferocity I am going to say that with those three, it will be possible, however I will treat it as though you are recruiting people and soldiers. Sometimes it'll be easy, sometimes it'll be difficult, depending on the creatures you are interacting with, their mood and disposition, what your character does, the Animal Handling checks you make, and how likely are they to keep helping you, because they're probably not going to be as loyal as a ranger's animal companion.