Wow thanks for the response everyone!
I understand the dangers of a cc thanks especially to my grandmother. I pay everything in cash except for the business purchases. I consider myself fiscally responsible and will never miss a payment (I hope

)
Problem is I already have a car, go to communit college, and live with my parents. I have virtually no expenses which works wonders for saving but not so much for building credit. I need to find something!
To zeke,
I work there and my parents are gradually working less and less. So I do the shopping for them (it's a restaurant). The idea is that I get paid to do the shopping but the primary goal is to build credit and get rewards points for vacation. They give me cash immediately for the purchase that I use to pay the card. What aspect do you find risky? Is it not good to show high purchases without high income?