Similar to Ethereum and other networks, the smartBCH network requires BCH in order to do transactions on the network. You can obtain BCH from any supported exchange and bridge them using e.g. CoinFLEX.
You can manually configure your wallet, by adding smartBCH network with the following settings:
New RPC URL:
Chain ID (optional):
Block Explorer URL:
After you've opened the Network tab, scroll down and click "Add Network"