Hello Holly! If you are not interested in installing actual barn wood products on your wall you could try some wallpaper that looks like barn wood.
If you're looking for shiplap I've seen people use strips of 1/4" plywood. alternatively you could try one of those wood grain paint rollers that gives the appearance of wood grain when you paint.
Hi Holly. You could install a shiplap wall.
Hi ! You could screw in flat trim moulding to the top and bottom of the wall you want covered . Then put up wood boards that you have banged up and aged and attach to the boards on the top & bottom of the walls. I posted a tutorial on this site called Quick & Easy Way to Make a Distressed Wood Board . It is an easy and fun project . Good luck !!!