Any musical instrument can be as easy or difficult to play as you make
it and accordion is no exception.
The best way to learn to play is from somebody who already plays, can
break down tasks to the simplest level for you, and encourage you
while gently helping you overcome the difficulties you encounter.
This being said, we know that accordion teachers are few and far
between. Luckily, there are those who can teach via Skype or
Facetime, there are instructional videos on Youtube, and there are
series of books like the Palmer-Hughes series for piano accordion or
the Galliano book for both piano accordion and chromatic button
accordion. Getting a good teacher is best.
Getting the advice of someone you trust who knows the instrument well
and can guide you in purchasing or renting a good instrument within
your budget will also help. It can be very frustrating to practice on
an instrument that doesn't sound good or has mechanical issues.
But the most important element in learning accordion is you -- your
patience with yourself, and your commitment to PRACTICE, PRACTICE,
PRACTICE! It'a a slow, sometimes painful process, but it will pay off
in the end with the satisfaction that you can satisfy yourself and
entertain others.
Good luck!
Alan