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.
Hey You are quite diligent, wow
In case you want to return some day... maybe this one helps?
https://sketchfab.com/3d-models/loomis-head-d0b3f4aa633a44d8bda8cfe2f779f1f8
You're making a lot of progress! I can definitely see a lot of improvement.
I think one of the main issues is that you're trying to go too fast. Try to slow down in the beginning and analyze what you're doing. You're talking about working on the mouth but you still have questions about the basic head structure and nose.
Aside from that, here are a couple of points for the proportions:
1. It's great to see that you've started drawing the cross, your circles look a lot better. But be careful because you're mistaking it for the eye line. Once you draw it out, erase it and then start drawing the lines for the head.
2. Remember the line in the center of the head indicates the middle. This includes the middle of the chin. It took me a while to realize this when I was learning...
3. Follow your guidelines. The nose should be within the lines.
4. Remember the side of the face is flat, so the edge of the circle should be cut.
Your noses aren't that bad, it's the construction underneath. I took the same nose you drew and placed it in the correct proportions.
It might help to draw over a few pictures of heads like you did with the body earlier.
Hope this helps!
Thank you! it helps a lot!! I didn't erase the cross because I was too lazy lol, I will start doing it from now on I just hate erasing stuff it takes too long in my opinion that's why I was trying to minimize erasing but I will do it from now on! And yes I agree I'm trying to go fast that because I want to get good asap but I will slow down. Also, is there an exercise I can do to practice drawing accurate circles without the cross or square?