To execute this easy project, begin by measuring the exact length and height of the wall sections that will border the bed, purchasing your pre-cut shiplap boards accordingly. Locate the internal wall studs behind the drywall using an electronic finder, marking their vertical lines lightly with a pencil. Install the wooden planks starting from the floor perimeter up to your desired header height, securing them tightly using a brad nailer and construction adhesive. Fill all exposed nail holes with high-quality wood putty, sanding the dry surface completely smooth with a fine-grit block. Apply a stain-blocking primer, followed by two coats of premium interior acrylic paint in a flat matte alabaster finish to create a uniform canvas.