Do report back please.
The staff at the Hub will be hugely helpful. Let them guide you...
Also, have a look throught the Scotlands People Hub site for background and some helpnotes here on RC.
Just ASK and ASK all the time really.
The name Edith Kirkwook is not common in Scotland, thank goodness. For example, I am not seeing many entries of marriages post 1945. One in Ayrshire in 1950.
I also know that if you do have a marriage, you can search on a terminal post late 1920s for children to a marriage using mother's maiden name. You can't use wildcards for this. Thankfully Kirkwood is not one of those tricky surnames with a multitude of variants!
Lots of things to work through for you...
Monica