I seem to me that you have quite a few cards with a lot of limits. Do you really need that much credit and another card at the age of 18?
I would be very careful about taking out more credit. You should also be careful not to charge more than you can afford to pay in full. Please be wise with spending.
Also I feel a little nervous about your dad opening up a card in your name without your consent. That is fraud. He should never use your social security number to open any accounts/ utilities in your name. If anything should ever happen, you would be fully responsible for all the charges.
J
If you want to help him build his credit, you could add him as an AU to one of your current cards.
You seem to be doing a great job managing your credit. Keep it up and don't allow your family to ruin your credit!
"Wisdom is the principal thing..."