How to operate mainnet WTA coins from MetaMask:
Go to https://metamask.io/, download and install the extension for your browser, register a new address (or import an existing address with a 12-word mnemonic seed, this step is only needed to log in, the address itself is not used further) and log in, press the round user icon — Connect Hardware Wallet — select Hardware Wallet, and follow the instructions below. After the wallet is connected, press Main Ethereum Network — Custom RPC and enter these network settings:
Name: Walton Chain Autonomy
New RPC URL: http://22.214.171.124:8645
and press Save. After the setup is completed, press Main Ethereum Network and select WTA.