How to come out to your husband?

So I am married to a het/cis male. I was born a female and for most of my life have identified as such. Recently (in the past 2-3 months), I have discovered I feel more comfortable identifying as nonbinary. I waited because I thought it might just be a phase, but it's not. Now, I kind've have already asked what he would do if a similar situation arose, and he said he'd be "ok" with it. I am not asking IF I should tell him, or WHEN. I am asking only HOW I should start the conversation. When I try, no words come out. I need help trying to word things in a calm and easy to understand way that won't potentially scare him off. TYIA.
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I got a lot of hate on this post. I decided to suck it up and just tell him, and he accepted me whole heartedly. Even asking what pronouns I was comfortable with. We had a long talk about what this meant for us, and overall he was just glad I was comfortable enough to tell him.
How to come out to your husband?
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