There is a word called "cautious independence", that is, when a person is alone, it is easy to do whatever he wants, and sometimes he is lazy to manage and control himself. This requires vigilance. I suggest you eat according to the normal three meals. Go to bed early and get up early every day, and make some plans for your day, such as running in the morning, collecting some information or studying by computer in the morning, and doing some hobbies in the afternoon, such as painting, listening to music, or contacting friends to play ball games and shopping. You can search some recipes online and make them by yourself according to the nutrition. Every day, you are very fulfilling and have a sense of accomplishment.