To start earning and receiving rewards on the Ethereum network, you will need the following assets:
USDT: USDT is utilised for depositing and validating FITERs, as well as for transaction fees charged on FITE.
ETH: ETH is utilised for the network gas fees, incurred on validating/depositing and quitting process.
For a first-timer, you may always purchase the assets from your trusted CEX, including Binance, Coinbase or Kraken and transfer the assets to your MetaMask wallet.