I had an area like that by my plaza. I did a double wide path lined with bushes and flowers alternating then trees and bamboo alternating. My area was a bit too small for pwps but at the end of it I did squeeze in a well which is actually really cute.
I'll try to do a diagram.
T-tree B-Bamboo A-Azela Bush F-Flower "-"-path "/"-Free space
Room for a bench in front with bushes and trees behind?
Picnic blanket - or make your own with QR codes laying on the ground with bushes and flowers surrounding it
Fruit Orchard with a path walking through it - it looks like enough room for
Oxoxo
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Oxoxo
Bamboo walking path area - if you surround the bamboo with QRs and bushes and flowers they won't get out of control ( as they tend to do!)
I had an area in my first town - same spot same beach shape. I went with a bamboo grove. I've had it 2 years now and so still love it but I'm tempted to put in an orchard.
It's a pretty spot! I know you'll find something with help from everyone