Moods change, so players' feelings towards a Minecraft skin will also change and that can create a carousel of skin usage. In any case, here's how to change it for Java Edition.

Under the image labeled for Java Edition, click on the link to change your skin. Select the model you'd like your skin to use and upload the .PNG file by pressing the "Select File" button.

How to change your character's skin in 'Minecraft: Bedrock Edition' Similar to "Java Edition," you can upload a skin you got from the internet, or one you've created yourself for your "Bedrock" ...