Are you healthy??

When I was child, I am not healthy very well. At that time, I didn't like eating and I had awh lot of unfavorite foods. But,  entering the junior high schoool, I started club activity. I was always hungry. Then I became to like eating very well. It  made me fat. However I became not to get a cold fruquently.
While, I have lived by myself since the second semester began. I have to cook myself. However, I'm not good at cook so I don't eat balanced meals. I should eat more vegetables, meat and fruits. If I get a cold and flu, there is no one that will help me. Also, I have to absent classes. It will difficult for me. Therefore, I try it hard to be careful not to take cold and cook various dishes!!! Would you teach me how to cook ???