How to buy Kaspa on MetaMask?

Hello there, I'm curious about purchasing Kaspa using MetaMask. Could you please guide me through the process? I'm a bit new to this world of cryptocurrency and I'm not sure where to start. Is there a specific exchange I should use to buy Kaspa first? Or can I directly buy it within MetaMask? Also, how do I ensure the security of my funds during the process? I'd appreciate any tips or insights you can share to make this transaction smooth and secure. Thank you in advance!