: Modern Minecraft skins support a dual-layer system. Use the outer layer to add 3D depth for things like hair, glasses, jackets, or headphones.
Which platform are you planning to play on, or Bedrock Edition ? Knowing this can help determine the easiest way to upload your finished skin! Minecraft Skin Editor - Tynker Best Minecraft Skin Editor
If you prefer to design your character on a touchscreen or while on the go, these dedicated apps provide the best experience: : Modern Minecraft skins support a dual-layer system