It took me awhile to figure this out.  Maybe I missed something, but I had to watch Lissie's other class (Finding Textures in Adobe Illustrator) before I understood I needed to hold down the option key when dragging a texture out of the library to have it be placed on the canvas as a vectorized image because it wasn't coming across that way and I wasn't able to recolor it.  It also took time to find the same fabric textures she used from Creative Market.  They're here: https://creativemarket.com/EnthDesign/26052-24-Seamless-Fabric-Textures