Don't overlook the Preface where you will get an overall view.
Metamorphoses 1 and 4 are the most useful.
You may wish to see only these two for now
and come back to the two others later.
Metamorphoses 2 and 3 are considerably more complicated.

Interlaced Circles are a merry romp
alternating major and minor segments
with a Metamorphosis 4 following a Metamorphosis 1
on each odd-numbered (dominantized) chord.