if I were in your situation, I would talk to my father and explain the problem to him. Don’t forget: You need to do what is best for you. It’s for your future and your life. If it is your passion, then fight for it! Lying is never an option! If you don’t tell the truth, you will always end up in trouble. It’s important what you yourself want and not what your dad wants. I think he will certainly support you and will always be proud of you. I also suggest that you should get in touch with a confidant of your choice, for example a guidance teacher, and maybe he or she can help you on your conversation with your father.