There is a landscaping forum here on NGA that you might find of interest. You could also look out for some of John Brookes's books on garden design such as this one if you can still get it:
https://www.amazon.ca/John-Bro...
The landscape design forum here in NGA.
https://garden.org/forums/view...
Does the grass not grow well there because of shade, or do you prefer not to have to mow that limited space?
Just to be picky, Cheryl, Monty Don is not a Master Gardener, at least in the North American sense, as he has not had any formal horticultural training.