Need help with Asset Bundle and general Sprite loading workflow

Hey Everyone,

I'm working on my first game. I have all graphics as prototypes right now on the scene and I want to change to the real graphics. But I just got stuck and I don't even know where to begin.

My game is a simple Match 3 board game where each tile is a block of some type.
Each Block is a 2D sprite (now it's just a simple sprite should be animation).
After pulling a block from the pool it's type (color/boost) gets randomized.

I bought a pack of sprites from the asset store which has many types of animal blocks.
The creator organized it in folders like this:
- Rabbit (folder)
- Idle (sprite..)
- Eyes Open
- Eyes Closed
- Bear (folder)
- Idle (sprite..)
- Eyes Open
- Eyes Closed

x20 other animals etc...

Problem 1:
I made a bundle with this entire folder but because bundles are flattened out I can't get specific animal when I load Assets from the bundle.

Problem 2:
I want to animate between the sprites without making Animation Clip for each animal and use only one Animation controller.