Were you a permanent resident before your 18th birthday? If you meet with an attorney they can help you to figure out exactly what should be your next step.
Samuel Ouya Maina, Esq. 415.391.6612 email@example.com Law Offices of S. Ouya Maina, PC 332 Pine Street, Suite 707 San Francisco, CA 94104
Acquired citizenship rules are complex so please consult with an experienced attorney who could advice you whether you would succeed or not in this. Take the documentation about your father's citizenship and your birth, his marriage certificate to start with. Best Wishes!
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I agree with my colleagues. In addition to arriving in the US as an LPR before you were 18, you need to also prove that your were in the legal and physical custody of your father. You should contact an attorney because this is a complex area of the law