through a process called denaturation, when marinated the citric acid changes effects the protein molecules in the seafood(fish) which allows it to "cook"
In order to be a cook, you have to love food. You have to be open to taste all things...even an octopus with peanut butter on it. Or a pickle with peanuts. You have to have a stable stomach like me....
Chocolate chip cookies.... little easy desserts...veggies....potatoes. You could also have a go at a traditional dish like shepher'd pie or spag bol if you have a good recipe.