Anna's Disorganization Disaster

This is a picture of our sun room/cold room. You see, we have no insulation in the room, so in the summer time, the room can be extremely hot, while in the winter, it's my second fridge. Most of the time, we just put anything and everything out there. Its a nice size room with lots of windows that overlook our back yard. It would sure be nice to be able to updated it, so we can include it as part of our main house instead of using it as a junk room with no ends in sight.

Ideally, it would be nice if we could update the blinds, do something with the walls, put some comfy funitures out, so we can enjoy it as a rec/reading room. Please help!

Thanks,
Anna