pulling the Notes field

Excuse the greeness in my powercli abilities so I am not even sure is I can explain what I am wanting so I will give you an example of what I am looking for

I would like to pull the "notes field" - IF POSSIBLE like this

$vms = "" | Select-Object VMName,  OS, (Notes

    $vms.VMName = $vm.Name
    $vms.OS = $vm.Config.GuestFullName 

    $vms.Notes = ??????

but I do not know what to query as in  querying for the vmname ($vm.Name)

Or am I just WAYYYYY in left field and not even on the right track?

So one, can I do it and what do I query with

two, is there an easy way for a dummy like me to know what I query from virtual machines... I like to gather info so I am sure I will have the same question about something else.

thanks!!!