I couldn't sleep 
so I did some extra proportion exercise. I want to know if the proportions and perspective are correct.
Good to see more drawings!
The main issues I see are your circles/ellipses and face structures. Before doing more facial features, I would try to work more on getting the structure down. The initial circles your drawing are a little long and I think that's making the jaw a little too long. I can tell you know the measurements because you drew it out, but then you ignored it and made the jaw longer anyway.
Here I fixed the circle and corrected the proportions. You did great with drawing the mid-line and the lines for the eyebrows and nose. Like I mentioned, the only thing I had to fix was the circle and the proportion of the jaw.
If you're up for a challenge, I would do a lot (50-100) of the head structures in pen and fix your mistakes with a red pen.
I think if you spend some more time getting your forms right (spheres, cylinders, etc), you'll be in a good spot to work on the nose, eyes, and everything else.
Hope this helps!
Thanks!! that helps a lot, tomorrow I will focus on the head structures
Just started drawing I did a warmup and the first set of 10 prop exercises will try to go for 100 today (I don't own a red pen so I used a random pen)
just realised you can rotate pictures on windows lol I'm dumb
nr 20 chin difference is 0.1mm forgot to write that
done with 50! 50 more to go
It's nice to see you focusing on the head shapes. I can definitely see some improvement, especially with the second to last upload.
The main thing that's throwing you off are the circles. Since your doing this traditionally, I would make a cross with a ruler and make sure both of the lines are the same distance. Then draw the circle over it making sure the sides, top and bottom are touching the tips of the cross.
