Have fun with your new wall.
I used batting for mine and then a friend helped me mark it with ribbons in 12" squares crosshatching. that was a big help.
I have mine folded using duct tape as a hinge and then fold it out when needed. Am still thinking of how to stabilize it against the wall as I want to be able to move it to open it.
The same quilting buddy did screw hers against her wall. She used anchors so the screws didn't grab the batting and twist it out of shape/place. It looks really neat.