Hello hello! Fun drawing! Building the human body in three dimensions requires a thorough understanding of fundamental shapes. Therefore, we always start with a simple mannequin before adding real human forms. Because it makes learning human anatomy simple, we always return to this phase. You can use the Loomis approach to learn it. He does an excellent job of illustrating how the human body twists and what is necessary to understand before posing the mannequin. That's why knowing how each geometric shape of the body is crucial to learn. If you want to improve with that, start by drawing each body part separately using only geometric shapes. Learn how to construct them, place them in different perspectives, twist them to see how they overlap, stretch them to get intriguing shapes etc. That's how we basically build form before moving into complexity of human anatomy or anything else. Hope it helps and happy learning! | Artwod Feedback