I'm not a dietician, but I would guess that you could look up on line for information about a well balanced diet and what it should consist of.
For now I think you should plan a scheduled menu for yourself so that you plan ahead to make sure you have everything in the house that you need to make your meals. Plus you will know ahead of time what you will be having.
Plan something for Breakfast, AM snack, Lunch, Snack, Dinner and then a light PM snack. I think once you plan a menu and see it daily, it will remind you to eat. Try to put things on there that you remember that you liked to eat. Maybe now would be a good time to be creative and try a new recipe.
Hope this helps you.
Keep us posted on how you do, okay?