♦ ♣ ♥ ♠
Did you click into the game or are you in the store? You can get to all the fishing holes from the Gaia world map- there's one just north of Barton, one further north between Barton and Gambino, and one at the Durem reclamation facility.
It takes time and patience to get the fish. If you're having trouble hooking one, try a different fishing hole. The one outside Logan's store is the easiest. Also make sure you have bait to work with. Grade F is cheap, but the fish you catch with it will be cheap also.
♦ ♣ ♥ ♠