Usually go to the supermarket to buy a lot of dry food, choose those that can fill your stomach, and you can use them if you can't get up in the morning.
Of the three meals, I think the most important one is the one in the morning. Try not to sleep late, because when you sleep around 10 in the morning, your stomach is no longer sleeping. This is the time when you are most likely to get stomach trouble. Be kind to yourself. I believe that you have just entered the university, and everything must be based on your own health. In a word, you must eat well and sleep well before you have the energy to study.