By the community, For the community!
Create a MetaMask Wallet using either a desktop computer or an iOS/Android mobile device. That will allow you to buy, sell, send, and receive LINU.
You can buy Ethereum (ETH) directly on MetaMask or transfer it to your MetaMask Wallet from exchanges like Coinbase, Binance, etc. Make sure to use the ERC-20 network when transferring ETH.