Hi, here are a couple of Youtube videos that may help
Michael's and Hobby Lobby carry a fabric medium to add to your chosen paint. It stays pliable and soft, so you it won't crack and feel scratchy.
Oh and, if you are covering a light color, you'll likely need 2 or more coats, so purchase enough medium for that.
Hello, there are lots of posts here:
My friend and I painted a patterned love seat. It took about 6 coats of paint and a lot of fabric medium but looked nice at the end! Good luck.