I came out to my parents last summer. I had asked them not to talk about it to the rest of the family, but my mom outed me to my grandparents in a really fucked up way just before Thanksgiving. It only took about three days for everyone else in my family to hear about it. It made me terrified to see everyone for the holidays since I remembered how awful they were to my brother when he came out. In the end, my family just avoided the topic altogether, like they could just pretend it away. And I was weirdly okay with that. It's been over a year now and no one has really confronted me about being queer yet, and I am safe enough that I can make comments about girls I'm into just to relish in how squeamish and uncomfortable everyone suddenly gets.
I hope things go over smoothly with you and your family, whatever you decide to do. Know that coming out (or not) to your family doesn't make you any more or less of who you are. Do what feels right and safe for you, and fuck anyone who tells you differently. <3