One mistake I made when learing how to nose in hover is that I always rotated the nose the the left... I eventually got good at rotating to the left and continuing with a nose in hover, but when I rotated to the right, I would lose my orientation even though I already have been nose in hovering for some time....

My recommendation, practice getting into the nose in over from both the right and left at the same time so you don't be come used to approching it from one direction only....