Hey, @yute yang, good to know you’re enjoying the Figure and Anatomy courses! About the Portrait Drawing course, I see what you mean! And, indeed, that’s true, it is not as developed as the other courses in terms of examples, assignments and critiques… I believe there’s a historical reason for that though: when Stan created the Portrait course, Proko was still a somewhat small YouTube channel, not as much a well-known art platform as it seems to be nowadays. If I’m not mistaken, Portrait was the first course he came up with, so it was sort of experimental in a way; and it was made over 10 years ago, so there still weren’t as many guidelines as to how to plan and produce the courses as there are now. Honestly, I’m not sure if Stan plans on developing the Portrait course and adding more lessons such as demos and critiques (at least not in the near future, as far as I know), so my best suggestion for you would be to try to make the most out of what the course offers as it is now. And there is a lot to take advantage of: all the Portrait course videos are super packed with important anatomical information and helpful drawing tips, so if you simply take the time to “dissect” that by taking thorough notes and making study sketches based on images and diagrams shown in the videos, you might already have a good number of valuable learning hours ahead, and that alone can end up functioning as a sort of “self-assignment”. Additionally, you might also try to look for reference that tackle what you feel the course is missing (for example, the features in extreme angles, as you mentioned), then draw some attempts on your own using the information you learn in the course in the best way you can, and then use this community here to get feedback afterwards - you’ll be sure to have someone take a look at your work and give you pointers on how you’re doing and what you might improve. Hope this helps! Good studies!

I don't have Stan's portrait course but do have a bit of experience drawing portraits. If realistic portraits are what you are going for, a good way to tell if you are on track is to overlay your drawing onto the reference image in photoshop or similar software and reduce the opacity of your drawing (if done traditionally.) You will be able to see areas where your proportions or shapes are different from the reference image and make changes accordingly. I know for me, drawing portraits was very challenging and tricky at first. Not to say I'm a master now, but what helped me to improve the most after learning the basic methods of drawing the face was to practice a lot. And by a lot, I mean I've drawn around 3500 faces. I know it's said often, but drawing more will help you train your eye to observe the shapes and structures of the face, eye, mouth, ect until it almost becomes intuitive. Hope this helps!