Stardew Valley Rat Problem

Slay Valley Mouse Trouble Shooter. Do they 3

I just sewed the valley and was looking for a rat problem in the old chapel. I went ahead and saw that a small drop was missing on the wall of one of the rooms. How do I fight / accept? How to complete this mission? If anyone has any fishing advice, can you help me because I was suspicious and only 2 herring were caught?

I can't help you find it (I need help too) but I only use a controller for fishing, it seems to be working fine for me (sometimes you need to catch fish Has to click / tap at approximately the same speed)

Stardew Valley Rat Problem