Force ability, in my opinion, shouldn’t be equated to physical training, like you would for a martial art, or for learning the piano.

The Force is based entirely on faith. The various powers have nothing to do with technique. It is all about believing in the Force, believe in it and its will, and also importantly, believing in yourself, because we all are a part of the Force.

It’s about believing that we are more than just “crude matter”. Since these films are meant to be fairy tales for children, then the message of believing in yourself is, to me, is a very important one. That was the same message the OT gave us.

Also, I personally don’t think the dark side should be interpreted as the evil side. The light and dark side are like yin and yang, which aren’t inherently good or evil. The Sith use the negative aspects of the dark side, and their own dark side, to bend the Force to their will unnaturally, rather than allowing themselves to let the Force guide them through life.

Those negative qualities that make people do bad things can be found in the dark side. Those emotions and qualities aren’t always inherently evil, but consuming oneself in those emotions can lead to imbalance.

Not a perfect description, but check out this article about the differentiate between yin and yang & good and evil. Then you can try to apply it to the Force.
http://www.jonasyunus.net/blog-the_yin_yang_of_good_evil