長いものはやりたくない

I've used the app ELSA SPEAK for learning English every day for about 8 or 9 months.
The app makes a user practice 5 pronunciation subjects that suit to user's skill.
The subjects have some type.
There are that I've wanted not to study type in those.
It's like a conversation type, and the sentence of my part is long.
Because my pronunciation skill inferior, so it's hard for me to speak a long sentence.
Today, the app made me practiced the long-sentence conversation.
As a result, today's practice time achieved an amount of 52 minutes.
Taking such time, I'm beginning to bore and don't want to try ever again.
Since next time, I may be won't try hard the long-sentence version, now that it's not suitable for my level.
To begin with, I can't be well even for a short sentence.