How to buy Realio on MetaMask?

Can you guide me through the process of purchasing Realio tokens using MetaMask? I'm a bit unfamiliar with the steps involved. Would you mind explaining them in detail, step-by-step? Also, are there any prerequisites I should be aware of before I start, such as ensuring I have sufficient funds in my MetaMask wallet or verifying my account? Additionally, could you provide any tips on how to avoid common mistakes or scams while making the purchase? Thank you for your assistance.