In a small space IMO I would keep the art to one large piece not a collage , when that sofa is open can you actually walk past the end. IMO the T.V should be across from the sofa not at right angles to it.

Agree with Patricia. A gallery will overwhelm this space. Save your special picture to place where you will
see it more and appreciate it, and find something fun for that wall,
that is large scale. Not sure what your taste is, it's hard to tell with
this photo. We can give suggestions if you give us a sense of your
style preferences...modern, farmhouse, traditional, etc.

I'd be
more likely to center the couch to the wall, add some pretty drapes, and
place the TV on a bureau with drawers, so guests can have a spot to put
personal belongings away. Then you can add some very small end tables
so they'll have a spot to rest a drink, or charge their phone, bedside.

This
is my guest room, with pullout queen bed. also VERY small, and doubles as a home office, so
I've creatively used a file cabinet as one end table, and a small stool
is re-purposed as an end table on the other side. I have a small, wall mounted television in the upper right corner of the room, just out of frame.

If you give us a sense of your style, we can
recommend specific pieces, etc. Right now you have a bright and pretty
blank slate and neutral couch to work with!