There are books at Joann fabrics and Hancock Fabric stores. It depends on what style you want/, just tabs to hold it on a rod or seamed on all 4 sides and held on the rod by clips? They have magnetic rods you can buy and they don't leave holes in the door.
I would like to do a shower curtain to match the bed quilt. Or I could get ready mades and add trims or another large border at the bottom. I could do touches of applique. etc.
The world is your oyster--go for it.