Ok, let's make the second exercise in this message.

It took me a while to finally get into all sorts of pursuits
Clarified it's a scan but you can't see the shadows so I also took pictures on my cell phone

Michal, good works, but we don't need shadows, we need to work in a graphic style. Let's try the same thing, but without shadows, with clean lines.

2nd time..

Hello Michal. The progress compared to the first drawing is huge, well done. Can be tweaked a bit to make the faces a little nicer. We make the eyes a little larger, we designate the bridge of the nose and the back of the nose, we make the nose shorter, the mouth is higher, the ears are larger. I corrected in your drawing, please have a look and try to make the same changes in yourself. And submit for review.