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here is an idea for you made form old planks of wood https://vickymyerscreations.co.uk/tutorial-2/make-easy-diy-headboard/
Hi, here’s what I just completed! I got a door at Happy Harry’s, $39., my husband cut off a piece from the bottom to even out the ends, some left over paint from the recently painted room, white paint is left over trim paint. I painted the door the same colour as the wall, then used a paint brush to splatter paint across it as well as the two shelves I picked up at Home Depot for $25. ea, to be used as night tables, adhered to the walls lengthwise. Queen bed is on the way!
You might find this video helpful.
I made one by cutting up a 4x4 into blocks and staining them. You can see how I did it here: https://www.flippingtheflip.com/2015/03/how-to-diy-wood-block-headboard.html