Personally, I feel that you exercise a little more. It is ok to walk 1 hour every day, and it is not a big problem to adjust the breathing rhythm. 30 sit-ups, 2 minutes of flat support will do. Spinning is recommended to be 2-3 times a week, and equipment training is enough. Overtraining can easily strain muscles. You are only 14 years old and not suitable for overtraining.
Personally, I suggest eating less or more. Everything is 7 minutes full.
I suggest you have a bowl of millet porridge, one or two small purple potatoes and an egg for breakfast. Personally, I think milk also depends on personal physique. If you get used to it, you can also drink milk, just a small glass.
If you eat bread, please eat whole wheat bread.
You can eat meat, fish and two kinds of vegetables at noon, and try to avoid fried foods and peppers (when you lose weight, your skin is sensitive, and peppers will irritate your skin, which is not suitable for you personally), and pickled foods should not be touched.
You can eat before five o'clock in the afternoon at night until you are full.
Eat fruit before five o'clock in the afternoon. Please eat foods with low sugar content, such as kiwi fruit and raw fruit. Ripe fruit has a high sugar content.
So it can be reduced by about 10J in one and a half months. If you cut off your diet again, you can reach 15J.
But remind you that reducing 2J a month is the best choice and the best adaptation to human body function.