You can never be sure how long any legal process can take. It depends on how fast your dad gets all your information ready, also it helps if you have a good lawyer. From what i can see. I feel like you should have no problem getting your citizenship. Since, your father and mother both have legal rights to be in The United States. Pray and have faith. One more thing. I'm not sure but, you might need both your parents for this process. If your under 18.