Thank you so much!! I tend to switch my tools very often, so I can’t give you one specific answer.
Generally I use brushes with the pattern option ticked on (I choose some type of canvas pattern usually).
For the first post ,I used brushes from the sketch v2 brush pact here: Sketch V2. (SK2) Pleasure to draw. including colored pencils and blenders
In the next two posts following that were my custom brushes. I can provide the brush file later if you’d like, I got the effect using a kind of masked brush.
In the post with the magenta haired girl, it was entirely Krita’s water color brushes plus a canvas texture fill layer on top of the painting layer (set to grain extract blending mode)
I hope this helps!