Hey there! Well done here! As for proportions. There are different methods. But what I would recommend most is simplifying the body into simple shapes (like the small drawing on the left) and learning more about landmarks. Especially landmarks, so you have a better understanding of how to measure body proportions. For example, measuring the body with heads, identifying that the elbows are usually at the height of the navel, or that the shoulders are at the height of the second head, etc. Proko has a great video on this topic on YouTube! You can check it out. Keep in mind the center line of the body. Unless the torso is turning, it will have an S shape, but if not, as in your character's 3/4 pose, the center line remains “straight,” so to speak. I hope this helps! :)
