You can buy NFTs on marketplaces like OpenSea and Magic Eden. Most sales settle in crypto, usually ETH on Ethereum or SOL on Solana, so the first step is a funded wallet. Some marketplaces also offer credit card checkout through a payment provider, but crypto remains the default.
That makes buying an NFT a two-step purchase for most people in Europe: first buy ETH or SOL on an exchange that accepts your payment method, then connect your wallet to the marketplace. The platform pages below list which wallets and payment options each marketplace supports.