Inertia

My best score in TOEIC is 560 .
I will be taking the examination again in October.
In order to prepare,I will be memorizing many problems and answers.
According to test form, the method is effective for getting a high score.
However, I falls into inertia easily using this method .
So i wonder, why am I studying by such a method?
In any case, if my points increases, I will have confidence. 
I am trying to have confidence in English.
However, is the confidence true?
The confidence is temporary.
A repetition of [Inertia→transient confidence→Inertia] may make real confidence.
It's as if a small snow ball is rolled and it will became a big snow ball.

Inertia

My best point is 560 in TOEIC.

My best score in TOEIC is 560.
I will take the examination again in October.
I will memorize many problems and answers.

I will be taking the examination again in October.  In order to prepare, I will be memorizing many problems and answers.

In order to get high point, the method according to test form is effective.

According to the test form, this method is effective for getting a high score.
However, this method falls into inertia easily.

However, I fall into inertia easily using this method.
So I wonder, why am I studying by such a method?

In any case, if my points increase, I will have confidence.  
Anyhow, if the point increases, I will have confidence.
It is trying to have confidence to English.

Note:  do you mean:  I am trying to have confidence in English.

or, do you mean:  It is difficult to have confidence in English.
Now, is the confidence true?

But, is this confidence real?
The confidence is transient.

The confidence is temporary.

A repetition of [Inertia→transient confidence→Inertia] may make real confidence.

The repetition of
It seems that small snow ball is rolled and it is made big snow ball.

It's as if a small snow ball is rolling and it will become a big snow ball.