Your guide is cool but can you make it more nicely? Like bolding titles and making numbers nice, just follow other high quality guide. Even if it is simple it should be in standard format. As well you may include the Screen Shots like job maker, vehicle, place of fisherman job in blip at F11 map. And everything that needs to be for the ones who will see your guide.
You can use fish for restaurant ingredients and to make fish cake in F9> Craft Fish cake
You can craft Fish cake through F9 > Fish Cake. Fish cake is a food to make your HP increase, just like the food you usually buy at a restaurant.
Nah, I got stuff to do, maybe @SugarVanilla would like to.