Creating new stroke shapes - by Handrawn

Draw a line with stroke shape

Clone it

Reverse direction of the clone [you can now set keystroke for this in pro]

Experiment changing the stroke shape of the clone and/or original [using page and layer gallery to select may make this easier] - having them different color/shades can help to see the effect

You can also adjust their weights individually

You can also try it without reversing the clone direction

When you have a combination you like you can use them as future reference [copy then paste attributes into your drawing for each line]

And you can try it with more than one clone.....