Need help budgeting for food

Hello! I am a student here and I usually just eat one convenience store bento along with a diet coke a day.
Can someone suggest me some easy recipes I can try?
I have a rice cooker and all
And I don't know where I can get good rice.
And overall just a few dishes
I tried egg and rice and it seemed a little bland for my taste.

by Quiet-Ad-3899