You've got nothing to lose and an undo button with you at all times. So, get going and make it happen:
Adjusting the magic wand
- Select the magic wand tool from the toolbar.
- Click on an area you want to sample. The magic wand will outline the area selected with flashing dotted lines.
- Hold down the shift key to add more areas to your selection (if needed).
- Hit the delete key or choose Cut from the Edit menu to delete selected areas.
What the magic wand is doing is looking at the overall photo and choosing pixels that are similar to the one you're clicking on. Adjust the tolerance up to make the magic wand select pixels that are even more like the one you're clicking on. Adjust tolerance down to make your magic wand pickier about choosing the area you want to cut out. Once you begin using the magic wand, you may decide you need to combine additional flashing outline areas to your overall selection. As I did, hold down the shift key as you click to add more areas (pixels) to your selection.