Recipes and advice for a teen who feeds herself?

I work, i use most of the money to buy good organic food, and i eat it myself. I do have a mother, but she is gone every other week and we rarely see eachother. She is a good cook, but for the past couple of years she has eaten little or she eats very bad food.

So are there simple, quick and easy things I can make?

I basically live off eggs, avocados, olives, dairy products, chicken, beef, salmon, tuna, berries, tomatoes, and occasionally bread.

I love it, but its getting old, and I’m running out of ways to prepare canned tuna! especially for school…..

i’m 17 and have little cooking experience