I've been purely using the basic round mixing brush in Clip Studio Paint for basically everything so far (lineart, colouring, effects, etc.) and I feel like it's not quite doing the job for me, especially when it comes to pen pressure controls and stuff (that might just be because my screenless tablet is 5 years old). The other basic brushes are the same deal. Other than gimmick brushes I've found, I can't find any good lineart brushes. I'm flat broke so I don't have clippy or the premium version of Clip Studio. Does anyone have any suggestions for downloadable lineart brushes I can find on the marketplace that are free?

First ever animation I've done in full colour. Had to do it in the free version of Flipaclip on my laptop (which made me feel like ripping my skin off), so I straight up just screen-recorded it to avoid the pesky watermark. I'm an idiot who was too lazy to look for free grass rustling sounds, so you can only watch it in absolute silence :(