can you read my short essay and tell me what do you think?

Question

if there is any mistakes and not organized well please correct
There are a lot of sport activities that place great importance for health, swimming is very important for good health and I believe many people have improved and prevent their illnesses througth swimming. As a matter of fact,my friend Diana had an asthma and all her weekends she used to spend in swimming pool during her illness condition. To be candid, now she feels much better and almost cured. Finally,
Eating a healthy food has decreased the number of illnesses. I believe that eating natural food and food that is free from artificial substances is important for good health. For instance, my aunt has a cholasterol and she is under medications to cure her illness. I always tell her why don't she take care of herself and pay attention for her food. Consequently, we need to learn and teach other people theimportances of good health. Each person has to know what procedure and operation can cure and prevent their illnesse

Answer 1

There are a lot of sport activities that have a great importance for health. Swimming, for example, is very important for good health; many people have improved and prevent their illnesses through swimming. My friend Diana, who had asthma, spent all her weekends in swimming pool. Now she feels much better that she is almost cured. Eating healthy foods has also decreased the number of illnesses. Eating natural food and food that is free from artificial substances is important for good health. For instance, my aunt has high cholesterol and is under medications to control her illness. I always ask her why she doesn’t she take care of herself and pay attention for her food. We need to learn and teach other people the importance of good health. Each person has to know what procedures and operations can cure and prevent their illnesses.

Answer 2

Do a spell check and fix your grammar.

Eating healthy food
My friend, Diana had asthma

Take out the extra a and don't capitalize Eating after Finally.