I'm glad you're out to them - good for you!
See, that's where a therapist can help you; they can help you define why you feel male, and what it means to you. For me, I always hated dresses and pink and girly things. I ran with the boys, rode bikes, climbed trees, ran around shirtless just like the boys, played boy games. Later in life, I turned into a computer geek, into Star Wars, Star Trek, physical work like carpentry and yard work, and I'd much rather talk to other men than women. I have more in common with men. Physically, I've always hated having breasts and not being built like a guy. I so so SO much prefer dressing as a man!
You can legally change your name when you turn 18. Your parents will have no say in the matter. However, you can let that slide for now and just ask them to call you Jake, and to ask that it be your use name for school. I've always used a shortened version of my name or my initials instead of my legal name. If you can get your friends to call you Jake, and tell your teachers (and counselor and principal) on day one that's your preferred name, it would be a fine start. All your paperwork can still be in your legal name. Maybe in 6 months or a year your parents will realize you're really serious about this and help you get the name change through the court, so your diploma will have your preferred name on it.
Again, it would really help you to see a therapist, get an official Gender Dysphoria diagnosis, and bring your parents to a session. They might get a better grasp of it from a qualified professional.
-Jay