I haven't gotten to this stage yet, but I am thinking that I wont bother insisting, enforcing, or correcting people on it. I'll let them know that my preference is my feminine name and pronouns, but if there is a family member or friend who rejects the change... I totally understand. The reason is because I made it to my mid-20's knowing that I was transgender, and I was rejecting it as much as I could my entire life... If it took me that long to accept it, then I don't feel like it would be reasonable to expect others to do it so soon, and people are still learning a lot about this struggle.
It doesn't make me uncomfortable if people misidentify me... I don't feel deprived or discriminated against if someone wants to or accidentally uses the incorrect pronoun or name. I am transitioning for myself, and it's nobody's business as to what is hiding under my clothing unless we plan to have a sexual relationship.