Fish for me (telapia) is deadly... I would avoid all meat , fish, chicken... until you get things under control...
Fruit is good , but strawberries, oranges, grapefruit, apples should be avoided.... keep it simple for now... bannas & canteloupe...
for cerial - eat rice & corn cerials - avoid the whole grain for now...
String beans, potatoes, corn are good for basic vegies....
Simple first... expand later....