I just made a minecraft rig that you can use for minecraft animations. You dont have to credit me but i prefer it. Subscribe to my channel on youtube: Stick Guy was here. to change the skin from steve to whatever click anywhere on the rig, go to material properties. (the checkered circle.) and change the base color the steve image texture to any skin you want. make sure its 64 x 64 pixels though or it will be wrong and weird with the texture.
Note: DON'T CHANGE THE UV EDITING UNLESS YOU KNOW WHAT YOU'RE DOING