I know the beach at Holland well.
As for your gathered "w", you may want to redo it? It can be a personal preference, some like small folds, some stagger the folds (big-to-small), some sew a small channel and run a cord thru ala warbonnet style (aka knotty's method). Some pull the side corners out an extra inch.
Take your pick, and see what you like.
Your hang looks good to me. Nice amount of sag. But that too is a personal thing.
Hang it the way you like it. There is no right or wrong, as long as you are comfortable.