Without providing a full guide (the Admin Guide, Wiki and Forum should be able to help with the details), you could use a PowerShell script to generate an ExternalList. Something like this:

$wmiServiceNames = (Get-WmiObject Win32_Service -Filter "StartMode='Auto'").Name
foreach ($wmiServiceName in $wmiServiceNames) {
    $serviceDisplayName = (Get-Service $wmiServiceName).DisplayName
    $wmiServiceName + "," + $serviceDisplayName
}

Note, the above will provide a list of Service Names and Service Display Names, separated by commas.
That way you can use instance discovery to split the two, then use DCI the parameter

System.ServiceState{instance}

while being able to use the more readable {instance-name} for the DCI description.

Going a step further, you can create an event, action and event processing rule to automatically attempt to restart a service should it not be running.

Cheers

most likely instance discovery for DCI creation should help (maybe with script a s a source).

Best regards,
Victor