It's good to know so your poses look natural and you don't end up with the weird spineless ladies that show up in comic books all the time. That also lets you defy reality with the knowledge that what you are drawing is unrealistic. One thing you can do is jsut get a little posable figure man instead of spending a lot of time learning this all from books
https://www.amazon.com/HSOMiD-Artists-Manikin-Mannequin-Decoration/dp/B07FLHJSYP
My sister used a desktop model to run through positions. She'd explain to me what and why she was doing it the way she was - totally went over my head - but it helped her.
Link to a full body model and some hand models. Dunno if this is what you were looking for but that’s what I use. Nice profile btw lol
For assessments, the biggest thing was making sure I hit all the important points along the way. The most useful tool for me was a little wooden artist's drawing mannequin (like the one I linked below). It has moving limbs and helped me run through the sequence of a head-to-toe like a dream. Scheduled lots of sim lab time for everything else...
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In my humble opinion the best way to learn figure drawing is this:
Learn a basic overview of the main muscle groups for head, shoulders, arms, hands torso and legs.
Draw each part individually a few times to get an idea of the main shapes of the bones and muscles. This will also make you more familiar with the basic shapes and allow you to simplify.
Use simplified models like this thing as reference: https://www.amazon.com/HSOMiD-Artists-Manikin-Mannequin-Decoration/dp/B07FLHJSYP/ref=sr_1_5?crid=15E0AN2VL01KL&keywords=Human%2BMannequin&qid=1653075885&sprefix=human%2Bmannequin%2Caps%2C247&sr=8-5&th=1
This will let you focus on just the proportions of each body part without being bogged down with detail or worry about muscle shapes. Practice as many different poses and perspectives as possible.
Once you have a better handle on proportions start replacing the simplified body parts with the body parts you practiced at step 2.
At this stage you should have enough knowledge to practice drawing full bodies with more detail. You should draw as many poses and body types as possible and really focus on getting the proportions correct.
The next level is what Brettinabox suggested. Now that you have a firmer grasp on proportions and anatomy you should focus on expressiveness and fluidity. Find reference photos with more dynamic poses and try to capture the motion rather than the anatomical detail aka "gesture". I personally find this more difficult that anatomical accuracy, which is why I don't think it's a good idea to start here. Generally this is something you can practice in parallel with anatomy.
You could for example start a practice session with a few quick gesture drawings and then pick your favourite of those and try to make a more detailed version while trying to retain that motion and expressiveness.