Once you start exploring Photoshop, you'll realize that removing image backgrounds is a crucial skill to mastering the program. This can be done using several tools, but there are also other ways. One of the more advanced techniques is to use a Brightness/Contrast Adjustment Layer. This is a good option, for example, when you have an image with silhouettes that you're trying to isolate from a bright decorative background. By pushing the Brightness and Contrast levels to the maximum, your background will likely turn white and make it much easier to delete using the Magic Eraser Tool or other method. Just a tidbit to look forward to when you're ready!