you can install an use popular crypto wallet app like : Coinbase, Trust wallet , MetaMask Wallet, or Exodus.
Create a New Wallet: Open the app and create a new wallet.
Copy your wallet address using the public wallet address provided by the app. (for the selected cryptocurrency)
After these steps, your software wallet will be ready for sending, receiving, then register on Linkvoicses using your crypto addresses and start sending crypto invoices fo free.