Downloadable Mini Mob Skin Packs for Minecraft Java & Bedrock Edition!

It's the exact same process that you install "normal" resource packs. If you're familiar with that process, do that.

Otherwise, follow these steps:

1) Download the Mob Pack .zip file
2) Open the folder that contains the downloaded .zip
3) Copy the .zip file
4) Open Minecraft
5) Click Options, then Resource Packs
6) Click Open Resource Pack Folder
7) Paste the .zip file into the /resourcepack/ folder.
8) In Minecraft, you should see the Mob pack under "Available Resource Packs". If not, click Done, then click Open Resource Pack Folder again.
9) Hover over the Mob Pack under "Available Resource Packs", click the Arrow to add it to your "Selected Resource Packs"
10) Click Done. You're ready to play.