Ham is a Group 1 carcinogen.
Cheese has large amounts of fat and salt and is unhealthy.
Chicken is unhealthy.
Put some beans into your salads instead of the above 3 ingredients.
As a student, try to budget accordingly so that you spend what you need to spend on food. Even if this means you buy next to no new clothes all year.
Herbs and spices make the difference between good home cooking and Michelin Rosette levels of cooking.
Read How Not To Die, How Not To Diet and How Not To Age by Dr Greger.
Cook evening meals in batches. So that what you cook lasts you 2, 3 or 4 evenings with you reheating it or eating it cold.
Wholemeal bread or rye bread instead of white bread.
Go for variety - even if you have spend extra to get those cherries instead of the apples you normally eat.
Unsalted nuts. Snack on them and add them to evening meals. Either raw or lightly roasted if you strongly prefer them lightly roasted.
Aim for a BMI of 21. That's the BMI associated with the best life expectancy. Your life expectancy is far more important than what you (or anyone else) thinks looks good on you.
There may be certain foods you have an aversion to. Be adventurous. Try them again. With you doing your best to try them in a context where they are ripe and fresh and cooked in the most delicious way. Which for something like carrots may well be raw and shredded or thinly sliced. For cucumber it's raw and medium sliced. For aubergines, in a ratatouille (Marco White has a good recipe on youtube) is great. Etc.
Aim to be the person in your kitchen at uni that has their act together when it comes to food and cooking. The person with a mature approach. Cooking proper meals (more often than not) instead of being like a kid and eating Heinz beans on toast, supermarket pizzas and ready meals all the time. Convenience foods have their place, but it's better if they're not your staple.
Aim to make it that you never starve yourself and that you always eat at the first signs of hunger. With the right quality of food you can stuff your face and feel full or satisfied all the time whilst having no adverse health effects, only beneficial ones.