This Chainlink has a dedicated connection to Kaiko's API. Kaiko is the leading provider of institutional grade cryptocurrency market data.
You will need to use the following oracle address, and Job ID in order to create the Chainlink request.
Oracle address: 0x8c85a06EB3854Df0d502B2b00169DBfB8B603Bf3
Price: 0.3 LINK
See the Kaiko Chainlink (Testnet) for documentation on how to use this Chainlink. It is strongly suggested that you develop your smart contracts in a testing environment first, before deploying to main net.