In terms of diet, it doesn't matter if you eat more fish. Don't eat greasy fish. If it is too sweet, it will grow meat. If it is too salty, it will lock the oil and the meat will not fall off.
It is best to exercise. If you can, you can go to the gym to swim or ride a bike for at least 40 minutes every day. If not, you can take a walk, walk quickly, and walk for more than 40 minutes every day. Walking is more useful and easier to stick to than running.
Wish you success in losing weight ~ ~