10:30 AM, Wednesday September 22nd 2021
For figure drawing a lot of people recommend Micheal Hamptons book. It is very good but doesn't explain things to the beginner. However I recently came across his lectures on youtube and they really helped. Might be worth a try.
https://www.youtube.com/channel/UCHNinW31ADYz1SRrYuSKPBA/videos
Remember, none of this is easy. Breaking through the resistance is difficult but with enough purposeful practice you will see progress. It tends to require focus with purposeful practice on one aspect for a bit then put it aside and focus on something else. Rinse and repeat.
As for the pen/ruler thing. Not quite the same as using a ruler if you are not using it draw but pushing yourself to judge by eye only should be the objective.
Hope this helps.