Try shooting a subject with both a wide angle and a telephoto lens. You can shoot a person, pet, building or still life. See what happens if you shoot form the same spot using the different lenses, how does the framing change? Then try to fill the frame using both lenses, adjusting your position closer or farther away. How does the background change, what do you loose or gain? How does perspective distortion benefit or harm the image?
The wide angle will seem to exaggerate the foreground and throw the background farther away. A telephoto lens will seem to compress the foreground and background making them seem closer together than our eyes would see it.
If your pictures aren’t good enough you aren’t close enough.