Are you wanting to use paint? I've done it several times, and it's pretty easy... though not forgiving if you mess up. Here's a post with my favorite stencils... and I've used some of these on fabric. https://jessicawellinginteriors.com/moroccan-tile-stencils/
How to Stencil Fabric (2 Easy Methods)
Hello. If you already have craft acrylic paints adding fabric medium to the paint can help transform your supply into fabric paints. Use fabric paints and a purchased or home cut stencil.
Pam: here's a great website about that!
Lots of good tips here from other Hometalkers
Here's a helpful tutorial
I would use fabric paint to stencil on the fabric
Hi Pam. You can really change the look of fabric using paint and stencils. I would use fabric paint on it. I have seen a lot of drop cloths being transformed with paint lately. Pam, check out the stencils on Amazon. There are a lot to choose from.
There are some great posts here that can help you:
This may help: https://www.hometalk.com/40559243/how-to-stencil-on-fabric-and-paper
I stenciled on fabric with chalk paint and outdoor acrylic paint. They both worked very well and washed good too. https://lifeonsummerhill.com/diy-rug-out-of-a-drop-cloth-and-chalk-paint/
check that pin https://www.pinterest.com/pin/223491200244122987/
You can use chalk paint or even acrylic paint.