I'm being forced to join the military? what do I do?

My family is forcing me to join the air force. I'm a artsy musical free bird. they don't like me being so. even though I'm not doing anything bad (drugs, getting arrested etc.) They still want me to join. They practically want to control my life and not let me choose a live of my own. I do not want to join but as it is getting closer and closer to me graduating high school I'm getting worried that my life as I am will be over and that I will have conformed to uniformity. Being who I am makes me special and my family does not support me doing so. I don't even think I can survive basic training. I'm 5'9 and 230 pounds female. What can I do? is there even an opportunity for me in the Air Force?