How to write an alpha symbol?

Excuse me, I'm trying to write an alpha symbol in my document, but I'm having some trouble figuring out how to do it. Could you please guide me through the process? I'm not very tech-savvy, so I'd appreciate it if you could explain it in simple terms. Is there a specific keyboard shortcut or do I need to use a special character map? I'm working on a computer running Windows 10, so if there are any specific steps for that operating system, that would be great. Thanks in advance for your help!