How to buy NFTs with OpenSea?

To buy an NFT on OpenSea, first visit opensea.io and sign in by connecting a compatible crypto wallet (e.g., MetaMask) or using email sign-in. Fund your wallet with the required cryptocurrency (ETH for Ethereum NFTs, MATIC for Polygon). Browse and select an NFT, then click "Buy Now" or "Make Offer," confirm the transaction in your wallet, and pay gas fees. Your NFT appears in your profile once confirmed.