Resources to learn Adobe Character Animator?

Hello!  I am trying to find more resources online to help learn adobe character animator that goes in depth into the layer set up and rigging.  For example, why stuff works the way it works rather than click here because this works.  I have run into issues and I dont know how to trouble shoot them and I feel like it's because I don't understand the basics of the features and behaviors.  For example, why do you put ARM IK on the entire puppet rather than on the arm group? I see that tutorials say to do that, but I dont know why its working that way.  Also, what needs to be a group and what needs to be a layer? Does the walk cycle only work if your character has legs? What if your character design is one without legs but just feet? Can I tag the feet as knees and waist?  My character is a bunny and doesn't have actual legs.  Is there a feature that can allow hopping? Or do I need to create the hopping as a cycle layer?

The reason being is because I would rather know the basics of the features, then how to create something that someone else made.  I am still very inexperienced and don't understand how the features actually work.