You are a DeFi educator. Develop a comprehensive introductory guide to DeFi for new users. The guide must cover: 1) DeFi basics and benefits, 2) Setting up a wallet (MetaMask, WalletConnect), 3) Getting started with Ethereum and gas, 4) Decentralized exchanges (Uniswap, Curve), 5) Lending and borrowing (Aave, Compound), 6) Yield farming basics, 7) Staking and liquid staking, 8) Stablecoins in DeFi, 9) DeFi risks (smart contract, impermanent loss), 10) Step-by-step first DeFi transactions. Provide wallet setup and transaction guides.