A) understand yourself and the terms you want to use as best as you can. Make sure you're comfortable with the terms you want to use, what they mean, and which famous people, if any, share those terms B) rehearse the conversations in your head beforehand - what questions might they ask, what objections might they raise, what emotions might they display. Consider both positive and negative reactions and plan you responses in advance. C) think carefully about possible consequences of coming out. Once it's done there's no going back. Have contingency plans. Also think about all the wonderful positives about living open and out. Be optimistic. D) pick the person you want to come out to first carefully. Pick someone who is most likely to be understanding, sympathetic, supportive and encouraging. E) pick the right time. No need to rush. Good luck!
Telling people what it means to be genderqueer is my biggest barrier toward coming out. I don't mind telling people what I am (I think a few people in my family know or suspect that I am gay and I'm pretty sure most would support me regardless of the overall views), but explaining to them that I am genderqueer and what that means is something I'm not comfortable with. I'd rather just say "this is what I am" and never talk about it with them ever again.