What program/brushes do you use?
i use ibisPaint X on my tablet. it's free, i think?? i use a LOT of brushes lmao, but since i dont color very often, here are the ones i use the most for my lineart/sketches (i dont usually change much from default, so unless i mention something its probably just the default):
(the layout of the brush menu got super frustrating to screenshot so hopefully this isnt awful or hard to understand)
Dot brush at 1px, 100% opacity. really fun to play with.
i use the calligraphy pen a LOT. this variation is about 4px, 2% opacity. i changed the initial angle to 26° for some reason. i mostly use light grays/tones because it looks nice n soft. i also use it for blending colors if i feel like it, for which i change the type from Mono to Water in the Type settings and set color mix to ~75%
Stylish marker (square lookin one) -- size varies depending on the feel i want, but its usually somewhere between 7px and 3px, but it's pretty much always 100% opacity.
ANOTHER calligraphy pen. 2px, 100% opacity. for some reason i have it on Water here, which i usually don't lmao.
last one -- Dip Pen (Bleed). 0.3px, 100% opacity. dont use this one as much as i used to, but it still looks hella nice
hope this answered ur question!!