this project has been deployed in GEORLI test network in Ethereum blockchain
1- install metamask from here and change to GEORLI test network.
2 - you must have some fake ethers for minting an NFT, So check this website faucet and mint some ethers.
3 - go to the my website and mint some NFTs (maximum 3 per wallet).
4 - connect your wallet to testnet OpenSea and go to your profile to see your NFT.
5 - you can sell it now on the OpenSea marketplace.