Declaring non-binary on your documents is a two-edged sword. On the one hand, it means that no matter how you present (masculine, feminine, or anything in between), your documents will match.
On the other hand, many people do not understand what NB means, which could expose you to discrimination or harassment. I applaud your bravery in moving forward and claiming your identity as your own. That takes strength, and I hope it all works out well for you.
My first psychologist told me, "It should never be difficult just to be yourself."