Use a strong garden stake, or a piece of rebar from your home and garden store. Get several clay pots (with single drainage hole at bottom). Slide the biggest pot onto stake, tilt until the side touches the stake. Repeat tilting opposite way every other pot.
Put the newspaper over the dirt 3-4 pages thick and then covered it with mulch. The newspaper will prevent any grass and weed seeds from germinating, but unlike fabric, it will decompose after about 18 months. By that time, any grass and weed seeds that were present in the soil on planting will be dead. It’s green, it’s cheaper than fabric, and when you decide to remove or redesign the bed later on, you will not have the headache you would with fabric.