Homecooking to save money from take out

My brother works at a facility home where they get better quality food. He brought back proteins like chicken, shrimp, salmon, fish etc. Planning to remake them into something else for lunches. Attempt to save more money in my bank for school.

Next meal plan:

Fish, egg, onion in form of fried rice.

The only time I buy something maybe forget packing a snack or an ice coffee to keep my energy levels up.