How to buy core on MetaMask?

Could you please explain the process of purchasing CORE tokens on MetaMask? I'm interested in understanding the steps involved, from creating an account to making the actual purchase. Could you also clarify if there are any specific requirements or prerequisites I need to fulfill before I can proceed with the purchase? Additionally, I'm curious about the fees associated with this transaction and whether there are any security considerations I should be aware of. Could you provide some insights on these matters? Thank you in advance for your assistance.