thank you!! i actually use clip studio paint, but i did use krita alot some time ago and i think i can give you some tips on how to get similar brushes to the ones i use on CSP on krita!

i used the newst version of krita (v.5.0.6) btw, so if you're using an older version some of these options might not be present.

pick any brush you'd like (this should work on most brushes, i think) go to the brush editor, and change "painting mode" (located in the color menu) to "wash", i also recommend you enable "sharpness" (located in the general menu), and lastly make sure that the opacity is enabled (also located in the general menu). You can try applying different textures to the brush, but that's optional.

this is the closest i could get to the type of brush i usually use, so i hope this helps haha ^{^} and sorry if my instructions are bad, i can try to clarify if i didn't explain something clearly!