Mint 10000 NFT's on Polygon Mainnet with ERC1155 contract | Sell on Opensea | Full Code Walkthrough

Resources:
Install Node:
https://nodejs.org/en/
Install VSCode:
https://code.visualstudio.com/download
Launch VSCode from commandline:
https://stackoverflow.com/questions/2...
Install Metamask:
https://chrome.google.com/webstore/de...
Remix:
https://remix.ethereum.org/
Get Test Ether for Rinkeby:
https://faucet.rinkeby.io/
ERC1155 Token standard:
https://ethereum.org/en/developers/do...
Polygon Mainnet & Mumbai testnet Config for Metamask:
https://docs.polygon.technology/docs/...
Opensea Validate metadata endpoint:
https://testnets-api.opensea.io/asset...
https://api.opensea.io/asset/your_con... (mainnet)
Polygon Mumbai testnet Faucet:
https://faucet.polygon.technology/