Aura I'm sorry my posts have added to your confusion. I too struggle with this topic. Johannes S, posted a great circle / ellipses animation. From the animation I my understanding is: A circle in perspective is an ellipse. Draw an accurate ellipse on paper and cut it out. An ellipse has 4 equal quadrants. An ellipse when correctly drawn it should pass the fold test along both axis. If folded along the major axis both halves should match exactly. If folded along the minor axis both halves should match exactly. If folded in quarter all quadrants should match. Observing Johannes's Animation As the cube tilts away, the yellow circle centre line ( it becomes the Ellipse Major Axis) moves toward the viewer. As this happens the circle changes into an ellipse. Viewed as an ellispse with repect to the moving yellow line the yellow line moves toward the viewer, to maintain the ellispses' major axis, minor axis and it's four equal quadrants. Notice also, as the cube rotates 90 degrees, so does the minor axis maintaining the conditions required by the ellipse. When viewing the circle as a circle in perspective. The circle centre is determined by the cube diagonals intersection. This is observed as the front half being larger than the back half of the circle. Remember: A circle in Perspective, is viewed with respect to a centre line drawn through the circle diagonals (cube diagonals) intersection. Not with respect to the ellipse major axis. The major axis is only used to create the ellipse. Fingers crossed Marshall Vandruff will cover Ellipses and Circles in Perspective in his Perspective Course. If my observations above are wrong, I'd appreciate feedback, thanks. Johannes S, Circle / Ellipse Animation. https://www.youtube.com/shorts/R4XWJ1ct1gI

You're never going to learn how to draw boxes unless you actually set one up and draw it from many different locations. This is the only way perspective is going to make any sense to you too.