for monochrome work I usually use these 3 brushes/pens (Clip Studio Paint).
lineart (by imo86): https://assets.clip-studio.com/en-us/detail?id=1687935
ink/oil (by ×ェ×): https://assets.clip-studio.com/en-us/detail?id=1678787
and hatching (adjusted by me): you can download the file in attachment section.
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for importing the new brush file (.sut).
just drag and drop the file into sub tool.
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Hope this is helpful to you.
Thank you for your support :)