I started figure drawing with live models in the beginning of 2017, I believe. My first figure drawing session. I had previously drawn figures and things, but never live. I needed to get used to the conte medium and drawing big. Then it took me some time to figure out a style for animation drawing: use tone, don't shade, have a variety of line thickness, draw from the inside out. For reference, I highly suggest you YouTube figure drawing videos. Only worry about getting the shapes and weight right, shading comes later. Look at Proko's videos to learn human anatomy. And study anatomy in your spare time (you know you always have some, even if it doesn't feel that way). I also recommend "Force--dynamic life drawing for animation". Beautiful drawings in the animation style, and good theory on how to think about the figure. The Croquis Cafe on YouTube is also great! They're short poses too, it's great for animation.

I heard that Sheridan students usually draw 1-5 min max poses. The time limit helps you check if you can produce at Sheridan standard. For your long pose, try not to use the full 20. 10-15-ish is ideal. Don't include a reclining pose at all. Draw big on newsprint: 1 figure per newsprint sheet. It's how you can capture the energy of the pose.

Can you erase? I hear it depends on the professor, really. Just don't. You'll be making hundreds of drawings anyway and you won't choose which to use until the very end. So leave your mistakes--you'll likely make a better one.