transitioning is a selfish thing, but you shouldn't feel bad about it. the way i see it is that, at the end of the day, you have to deal with you and your decisions because it's your life. if other people can't accept that, then that is their problem. who knows though, maybe it will go over better than expected. there is a lot of resources for parents, and even how to come out to them. you'll be okay, just know that if you keep waiting for everyones approval, you might not ever go through with it so deciding to go on t even if they aren't cool with it is a good choice imo. we wait too long sometimes, wanting the "right time" or worrying about the reaction people give us but honestly, there is no right time, and people will surprise you.