The worries of a young person are often complex yet simple. A poor lad in the mundane world might only wish to eat his fill, dress warmly, and if there's some money left, buy a small gift for his parents to bring joy throughout the day.
If one day, by the small river near the village, under the willow tree, with a gentle breeze and warm sunlight, he encounters a young girl in a green dress, he might wake up with a smile from dreaming. And after that, the thoughts of that girl could become the main worries for the young lad for many days to come.
A passionate youth and a spring-like maiden. The throbbing of youth seems adorable on ordinary people.
As for cultivators, at the same age, they probably think about whether their cultivation has progressed today, how their senior brother is progressing, and whether he will surpass them by a large margin. They also consider how their junior brother is cultivating and whether he will catch up quickly.