Make sure that the Network is “Goerli”. If not select the network inside the top left dropdown menu.
After setting the network. Select “Send”.
PS: Goerli is a test network, the ETH/Tokens/NFT all hold no monetary value.
The address of the receiver is the must and you can confirm it by typing, scanning or choosing address inside the upper text field or you can select from the “Contacts” if you already have some.