Here is a step-by-step guide to download and install skins for Minecraft, both on the Java and Bedrock Edition.

However, fans can create basic boss bars and make them display on screen in just a few keystrokes. Note: Custom boss bars are NOT available in Minecraft: Bedrock Edition.

If you want to create a Shield in Minecraft, you need to Iron Ingot and 6 Planks and place it on your crafting table in the arrangement mentioned here.