how to do rough scetches when drawing a character in adobe animate

i find that there is no brush that makes it possible to make a rough scetch before drawing over it with clean lines. the classic brush is potentially good for cleaning it up but i dont find any brush fitting for my needs. Also there is no brush that adapts to pressure sentitivity, which in general is super important when doing rough scetches. This makes it impossible for me to draw characters(and other stuff) in animate. 

Thanks for helping out:)