Well for me family are the people who love me and care about me no matter what...
In my life I know people who have completly no ralationship with their families, for several reasons...but you know what they did , they found new people in their lives and created new families

and their happy now...
So if your family really doesnt care about you then I wouldnt call them family, I think you should move on, dont give up you dont disgrace them , transitioning has that kind of risk , if you think you can make up with them then try , but if not just move on...
You cant change anything if you are not prepare to make sacrifices...
At least thats what I think