niTeLiTe

As far as I see, you have to cut the cylinders in half. 6 and 7 are not right, the line should pass through the centre of the ellipses.

If you think that you are cutting the ellipse in half, then there is no single line that does the job. Consider a circle, is there only one single line that cuts the circle in half? No, and same is with ellipse. This is because ellpise is nothing but you looking at a 2D circle in a 3D plane from different perspectives.

Even a newspaper is okay, all you need is a surface where your ink can stay.

You should read the complete challenge first...

https://drawabox.com/lesson/250boxes/1/lineweight

Start scribbling when you got a pencil, a paper and some free seconds in your hand. Make sure your scribbles are getting the way you want (better and better) everytime you...scribble.

You can imagine these arrows as ribbons, if it's difficult to imagine, take a ribbon or just a strip of paper and try keeping it on a flat surface like this:

https://www.google.com/url?sa=i&url=https%3A%2F%2Fwww.shutterstock.com%2Fsearch%2Ftable%2Bribbon&psig=AOvVaw0k3rtPtHxSooKn-c692ZL9&ust=1633666792353000&source=images&cd=vfe&ved=0CAsQjRxqFwoTCKjOkKG5t_MCFQAAAAAdAAAAABAJ

Try to understand how the distance between the 2 parallel lines decreases at the ribbon turns. Draw the ribbon in your table multiple times. Repeat this execise from different angles.

Advise on how to make curves without rushing: Take a deep breath, gently touch th tip of your pencil to the paper, breath out and gently trace the pencil. This will relax your body and bring your hand in the relaxed and smooth motion. Try drawing random waves in random directions first on a paper. Once you get a knack of it, will you realise you sweet spot.