See if you can find the cutoff as far as when you can legally consider yourself female. When I transitioned, for F to Ms, once you were on HRT and had your chest done, you could legally become a male. From there, see if there is a transgender group in your area. They tend to stay quiet, so look on the net. You might be able to start Hormone treatment although I don't know how much it is for female hormones.
Sometimes the family, or some members in the family can't deal with it and you may lose someone close to you for months or years. Growing up, my younger brother and I were very close. When I came out, he wouldn't talk to me for over two years. Our relationship has never recovered. Transitioning usually means paying a price that has nothing to do with money. People don't understand, and as far as your family is concerned, when you transition, they feel they have lost a son. That means going through a very similar grieving period. They have to take all the pictures of you out of sight and change their thought process. I had mine done twenty six years ago and my mother still makes a mistake and calls me her at least once a visit.
You may have experiences that hurt deeply. When I would visit my parents, it was usually summer and often early July. We would always walk to the main street where the fourth of July parade was. My mother would tell me to cross the street and not stay with her and my father so she wouldn't have to explain me.
You might want to google sites that have done research on transgender and the causes of it. Genetic differences, too much of one hormone in utero or a problem with the mother's hormones are all possibilities. Look at medical abstracts and copy them. Sometimes people can accept something like a transgender child if they think the cause is something that was out of your control. It wasn't your choice, but have some back up articles.
In the meantime, come here and talk to us. We have all had our trials by fire and can help you get through this.
sam1234