What emotions did Liuqiao express in the evening?

Let's look at the original "Liuqiao Night Watch"-

Liuqiao overlooks the land tour in Song Dynasty at night.

Pupu hears the fish jump and waits for the crane to return.

Idle clouds don't make rain, flying beside the blue mountain.

To understand the emotions expressed in a poem, we can try to understand the poet's mood and emotions from the characteristics of the scenery described in the poem, and then grasp the sentences in which the poet directly expresses emotions in combination with the writing background of the poem.

This poem is lyrical about the fish jumping, waiting for the crane to return, idle clouds and so on. , and expressed the author's faint sadness about being idle and unpaid. The first couplet is about his idleness and boredom, and the second couplet uses idle clouds as a metaphor to show that he has to express his grief in a tortuous way out of necessity. ?