Aswath It happened to me too at that age. Unfortunately, I didn't have anyone to support me then.
The best option for you right now is to study hard, graduate, get a decent job, move out from your home and then become what you want to become.
Fighting with parents who cannot understand will only increase your trouble and believe me even if they are open minded, they can't accept you. Your troubles will only increase.
Study hard for the next ten years and at 23, you can become your dream personality.