How to use Minecraft Behind me is my true self, but I look like this skin ?

Learn how to download and apply the Behind me is my true self, but I look like this skin for Minecraft on PC (Java Edition) or Pocket Edition (PE).
PC (Java Edition):

1. Go to the Minecraft website and login to your account.
2. Click the “Minecraft Java Edition” dropdown menu and select “change skin”.
3. On the next page, click “select file” and upload the Behind me is my true self, but I look like this skin file.

1. Open the game app and press the “dressing room” button on the main menu screen.
2. Press “Edit Character” -> “owned skins” -> “choose new skin” and upload the Behind me is my true self, but I look like this skin file.

Does this skin have thick or skinny arms?

This particular Behind me is my true self, but I look like this skin has thick (4px) arms. It is based on the classic Steve model.

What color is this Behind me is my true self, but I look like this skin skin?

This particular Minecraft Behind me is my true self, but I look like this skin has the following color palette:
Wheatfield
Millbrook
Biscay
Silver
White