(Although it’s worth saying I still don’t think I can draw noses properly as my style is always changing, but I certainly have improved over the years. XD)
Face forward:
This is the basic set up of how I draw a face, and I always start with the nose first, then everything else on the face.
Where the eyeline crosses the vertical faceline, I draw the top of the nose bridge, making sure the tops of the lines curve outwards towards where the eyebrows will go.
Keeping along the vertical faceline I draw the circle that is the tip of the nose roughly in the centre of the bottom half of the face.
Then I add the nostrils.
Then I erase the lines from the nose, and a little bit of the circle making the tip of the nose, just to keep the illusion of it’s roundness still there.
Face side:
(This is also a good reference for drawing the side of the face, if you want.)
From the eyeline I plan the eye, two line making an acute angle that represents roughly where relaxed eyelids sit (I keep this plan in usually when drawing so I can draw the eye within the angle, but for this, I’ve erased it out). I extend these lines out of the face; the points were the angle lines cross the face plans out the whole nose.
For the dip in the nose where it follows the dip in the eye sockets, I follower the circle of the head, then I continue on to draw the shape of the nose out from the face*. The bottom of the tip of the nose is the same point where the bottom line of the eye angle crosses out of the face. (*This varies depending on the shape of the nose as noses can be very different; I suggest looking up photo references for them.)
Then I add the nostrils (the holes of the nostrils are more obvious here than in facing forward as you would probably see when you look in the mirror) and a small line to represent where the nose curves off on the face, roughly where the eyes start.
A Glitch Named Anti 