fits the stairs. I like the idea of the plexiglas so you can still get all the light as well as see the enclosure and any photos , etc that you may put there without them being knocked down as easy. It also depends on how sturdy the enclosure is as you said, it is not weightbearing. You can also look at decorative screening which would also keep the light as well as allowing better ventilation. It may be an idea to check with remodeling places or Home Depot type stores to see if they can offer ideas.

for a porch railing.

But it appears that you like light and airy decor so I would go with lightening up the walls, perhaps a light blue drape on the sliding glass door, a large piece of artwork over the mantle. White bookshelves beside the fireplace and if you could find an area rug with a touch of the colors from the wall, fireplace and drapes. Artwork on the chevron wall could be simple like white (or light colored) stars (3 to 5 fair sized ones). Ceiling fan blades could be painted white or to match the drapes.

very hard to find good deals like that. People seem to think they have a gold mine and overcharge lol.

as I like the natural light and the openness.

after.