The fish quest, here is how you do it. (I'm doing this coz I wish someone else had this guide for me)
1. Take quest obviously, and speak to Aron or whatever his name was, the guy in the restaurant.
2. Go to Reston, the starting village, talk to the fisherman dude at the far western side of town, not in a house or such, at the "river".
3. He tells you to go to tool shop and talk to some merchant, he is in the tool shop of Reston, speak to dude and river fish done.
4. I went to Aron and reported but I don't think that part is necessary, just go back to fisherman dude and tell him your issue with that other fish, and he will tell you that a maid has it or whatever, if he doesn't talk about it then go to Aron and report.
5. Go to Village Chief house, and talk to the very first maid, she will talk about fishing, and hobby and whatnot and guide you to the butler on the second floor, at village guy, talk to him for the 500 rupees or whatever currency if you haven't
, but else speak to the butler and he will talk about stuff that I didn't read and you got a fishing pole.
6. Go to east of Reston, change maps, east east to beach, and fish!
7. You can enter cave there, but if you're doing this for Purim, which I presume you are then wait with the cave I'd say and bring her along, or you can do it right away, either way but Purim can follow you and will say some not so interesting lines. And she is a healer.
8. Go back to Aron and just finish the quest, and back to guild house to complete.
9. (Optional) Be cool and helpful!
10. Done!