A junior frontend developer I worked with was integrating a dApp frontend with a smart contract but was unsure how to handle wallet connections and network switching. I walked them through how MetaMask injects the Ethereum provider, the differences between web3.js and ethers.js, and how to structure asynchronous wallet interactions. We discussed how to detect network changes, handle user rejections gracefully, and why it's important to abstract provider logic to avoid tight coupling. I emphasized the need to build smooth, user-friendly onboarding experiences because blockchain UX is still a major friction point for adoption.