You can do veggie on extra easy and have as much fish as you like.
Extra easy is pretty much eat what free food you want but you only have 1 heb and 1 hea
As long as you have a third speed food with your meal, weigh and measure your healthy extras and have 5-15 syns a day
You'll lose weight.
Speed food are fruit and vegetables free on what would have been both red and green days. Potatoes , parsnips and beans would just be free food, for instance, but lettuce, cucumber, tomato, carrots , apples, oranges,pears etc are all speed.
I would suggest grabbing a mag, or joining a group to get all the info you need, failing that there's plenty of support here if you find yourself getting lost again x