Sites like Skindex are a great source for you to find the skins you want to put on before starting one. You can find skins for free in Minecraft, but if that does not suit you, you can always create your own. Now, you can use many online sites to download the skin you want, but if you want to make your own, here are some steps you can follow.
Skins can give you a unique identity and, in rare cases, can spark conversations between you and strangers in the game. People have tried on everything ranging from Batman and Thanos to Naruto and Goku. Aside from the default skin, you can download tons online, purchase via the marketplace or make yourself. Skins allow you to distinguish yourself from other players in the game no matter what mode you are playing. Change your Skin in the Bedrock Version.