Group Policy and Registry Keys

Hi all,

Not a SysAdmin (I think, technically), but part of the company's general-purpose "support" team. I mostly know hardware/application concepts and some practice, plus I Google things well. When it starts getting towards PowerShell or CLI stuff, I'm at a loss. My manager's asked me to start handling things caught by our vulnerability scanner(s) and push GP updates and learn about the Registry and such. My Google-fu is good but sometimes I get overwhelmed, figured I'd come here to see if you knowledgeable folks had advice on where to start?

Thanks!