How do I buy WETH with MetaMask?

Could you please elaborate on the steps required to purchase WETH using MetaMask? I'm particularly interested in understanding the initial setup process, including connecting MetaMask to an exchange or platform that supports WETH trading. Additionally, could you explain the process of funding my MetaMask wallet with the necessary cryptocurrency to facilitate the purchase? Finally, could you guide me through the actual trading process, including placing orders and confirming transactions? I would greatly appreciate a detailed explanation of each step.