[17 days later]
I just started this diary and I already skipped almost 3 weeks writing in it. Who knew fishing is this hard?
I also got back to the cave where I found my rod. Turns out there are more treasure there than the rod like bait boxes and a small pouch full of hooks. I found some torn pages, too. As it seems the skeleton guy was a famous angler looking for his next big catch. Unfortunately, most of the pages decomposed in the damp cave, but I found some notes about a hidden pond near the village. I must find it.