In order for your custodial parent (your father) to get child support, your mom would be paying for that. Only parents pay child support that is ordered by the court. So, if there is a court order for monies to be used for education, your parent's divorce decree will have that outlined.
Typically, child support ends when the child reaches 18 and is no longer a minor. If that is the case, your father will not be receiving ANY child support to give you for your college education or, as you say "starting money". If you KNOW monies should be held for your education, then you need to go to your mother and have her petition the court to have a separate account for your education funds.
Child support is not usually given to the minor child, it is used to support the child. Support includes but is not limited to: The food you eat, the heat and or air conditioning in the house you live in (electricity, oil and or gas), lights, rent or mortgage for the house you live in, medical expenses, transportation, the clothing you wear and all things you use under your father's care.
In summary, you need to find out from your mom if your father is supposed to be spending child support funds for your future education. If that is the case and he actually spending the money allocated for you and your sister's education, then that money should be held in a separate account so he cannot spend it.
I hope this helps. Again, realize this: Unless it is specifically stated in the divorce decree that child support monies are to be used and or saved for your education, then you have zero merit to your concerns. Child support typically is not for you to spend, but for your guardian/custodial parent to use to pay your living expenses.
Now, it seems as though there is some discord between you and your father. I would think long and hard before you get off of your high horse and do something that may very well hurt him. So before you "use certain information against my dad so I can use the money....." you had better get your little fanny to your mom's house and find out about how child support is disbursed in accordance with the divorce decree.
PS. Many kids your age are on the outs with a parent. I suggest you think long and hard before plotting against him. Do not be a smarty pants because you really do not have a clue about child support circumstances. With all due respect.