Break your finger /j
On a serious note, I dont really know any good inkbrush tips, but some good guides are this one by paxCaster, and this one by Phonochirp. Phonochirp is a bit slow tho, so if you want to watch that one I recommend setting it to 1.25x speed. You can also go to sendou.ink and look at builds and VODs for inkbrush. Hope this helps :)