Well, turning the image by 90° or 180° would have been nice.
Your shapes and proportions seem to be spot on. The features of the face appear where they need to be, individuality (likeness) and expression are very easily readable.
Your line quality OTOH is a mixed bag. On the upside, you are capable on focusing down on a single line, there are no bundles of excess lines, which would leave the viewer the choice to figure out, which one is the main line.
On the down side, your longer lines are still very visibly assembled from a lot of short individual strokes, which diminishes the clean and deliberate impression of your work quite a bit.
Ideally really train to find longer lines, and to draw them as a single long line.
Look at the reference, find the longest simple lines possible, plan them out on your page ("shadowing" is absolutely allowed, i.e. moving your hand several times in a drawing motion over the paper, without your pen touching the paper, while already trying to "see" the line), then draw in one bold move. Some technical warm-ups, when you only focus on drawing straight lines or curves very cleanly in different geometric patterns without having to think about a reference might be useful.
Your drawings will start to look a lot more confident and professional if you practice that, and you will get a natural looking dynamic in your line weight, as lines tend to be slightly broader and darker where they start.
If you feel like you absolutely have to assemble a specific line from smaller strokes, at least pay attention to blend your individual strokes into each other. But learning to rely on long lines should be your main focus atm, as this is what holds your drawing back the most.
Thanks for the good advice and tips. I'll try to clean my line.
Looks great! You've captured the expression without overworking the details. Nice job!
Nice job on your linear expressions, despite those expressions being rotated onto 90/180˚. They seem very readable and completely clear to me.
I think there's one smallest and most insignifigant way to refine your expression drawings. Your expression and face drawings look a littlest bit far too wiggliest and shakiest. Would you be alright if you would liven up most of your lines with 30 more minutes of 28 second face and expression quicker sketches? (1800/28=64 scribbly faces and expressions with the quickest and slickest edges)
And while you're at it, kindly check out this link, here.
The two logics is because of, 1) you'd be able to get greatest and fastest with your expressive facial drawings, even if you're gonna do it all with blind contour drawings (though it's way out of your current comfort zone, but it's totally worth it...!) 2) Practice makes myelin, and myelin makes perfect.
For more info, be sure to check out an Audible of Daniel Coyle's The Little book of Talent.
My hat's off to you.