Go with more experienced hikers (more experienced with winter hiking, and more experienced in the White Mountains). Hire a guide service if you don't have experienced winter hikers in your social circle.

Start with shorter hikes to gain experience.

Do not underestimate the impact of wind once you get above the tree line.

Trust me, you're already underestimating the impact of wind once you get above the tree line.

You're probably still doing it, aren't you?

Take a few minutes to meet one of the nice people who will have to carry you of the mountain if you f#$@ things up. https://youtu.be/YtRLk7FjdVc