The red circle in the picture below shows the location where you can buy the best fishing equipment. There is a shop here but too small to show up.
Edit: But DON'T fish here! Go to another easy fishing spot.
If you had ever played Rapala fishing games on XBOX360, the fishing in this game is totally a joke. The hardest part may be lure the fish, but still very simple. Cast the lure, and there will be a red indicator bar if the fish is attracted. When the red bar shows, start tapping
very lightly. You can't keep tapping or it won't work. There is a rhythm: tap, stop, stop, tap, tap, stop, tap, stop, stop, and so on. It's much more like teasing a woman if you know what I mean.
Once the fish is hooked, push
when the line is tensioned, press
when the line is not tensioned, and you get the fish.
There is no difference between catching big fish and small fish. It only counts how many fish you fished. So just go to Galdin Quay and fish the spot over and over. It takes about two hours from level 1 to level 10.