The Ring Nebula is the probably most famous planetary nebula, it is certainly a
good example of the class.
Planetary nebulae are much, much smaller than diffuse nebulae and thus much more
difficult to observe. The Ring Nebula is only about half a light-year across.
(But, for perspective, that is roughly 500 times the
diameter of the solar system.)
It has a relatively high surface brightness and so is somewhat easier to see
with amateur equipment. The central star, however, is very dim.