fair enough, i held back too for a long time. maybe you could do with doing some studies? and just drawing loads of head structures to get more of a hang on it. with deep set eyes there can be this almost continuous ridge of the brow down the nose, which makes it easier to draw. like this
for me, doing that continuation from the brow ridge all the way down the nose (and also pushing out the far eyebrow ridge) makes it a lot easier to give the nose form, and to extend the expression. idk if itll work for others but worth trying?
ill be looking out for your comic, though. this looks good!