How do I transfer my Alpha coin to MetaMask?

Excuse me, could you please clarify how one might go about transferring their Alpha coin holdings over to MetaMask? I'm not entirely familiar with the process and would greatly appreciate a step-by-step guide. Is there a specific procedure that needs to be followed, or are there any potential pitfalls I should be aware of? Your expertise in the field of cryptocurrency and finance would be invaluable in this regard. Thank you in advance for your assistance.