I've just finished my second Masters dissertation, and my supervisor is pushing for a paper highlighting one aspect of my findings. The problem is, I'm so anxious (in general, massive impostor syndrome going on here) that I can't do it, much as I want to. To make matters worse, I would really like this same supervisor to supervise my Ph.D. (starting work on proposal once this paper is out of the way), so it really needs to be good.
Any advice for a newbie please? How can I not make it seem like such a massive deal?