Lost ETH Through changing to RBTC Account?

I transferred 0.34 ETH from coinbase. It came into my ETH wallet. I then followed this guide MetaMask - RSK Developers Portal in an attempt to add the RSK Mainnet so I could then get RBTC for a DeFi coin. When I did, my wallet changed to 0 RBTC. I can no longer see, or find my 0.34 ETH. Is this lost forever? Or can I revert back to an ETH wallet?