Don't worry about it, Ron. I feel the same way about calculus.

Finish painting the patches for your mask. Use solid colors for now. Then go find some nice fabric images on the 'Net; the more the merrier.

In your paint program, load a fabric image and copy it onto the clipboard (most programs use the hotkey command CTRL-C to copy).

Using the Magic Wand tool, click on one of the colored patches. The Magic Wand selects all pixels of similar colors, so it should select the entire patch and nothing else. If not, fiddle with the wand settings to adjust its tolerance.

Now paste the fabric image you've copied into the selection. You're on your own there; each paint program has a different hotkey for that command. Do that for each patch, using a variety of fabrics, and you'll end up with a great patchwork-quilt map.

I posted some tips for fixing the mask-size in your other thread.