What do you actually want? Do you want to learn how to filter or do you search for services with a specific start type?
Running your code like you shared it it should actually return nothing at all. If you remove the pipe and run only the first part it should return the object representing the registry path HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services. If you’re looking for the individual services you should run it like this:
!! notice the backslash right before the asterisk.
Since "Start : 3" is just the text representation PowerShell creates for you as ouput of the DWORD value of 3 of the setting "Start" you would need to read those values for each individual service and check if it’s 3.
An easier way to get those information would be to use
And BTW: When you post code, sample data, console output or error messages please format it as code using the preformatted text button ( </> ). Simply place your cursor on an empty line, click the button and paste your code.