Fantastic stuff, thank you so much for joining in and sharing 
In my opinion, the best way to get started is to play around with everyone’s ink brushes like Ramon’s and Gege Akutami, and play with them/their settings (Some more: Rakurri has some great ones, Aurelia too, and there are even some cool default ones like Sumi-e)
If you want even more reference, browse this!
The idea is to make a copy of a brush you like and use it as a template. Eventually you’ll figure out what setting-combo does the thing you want - and before you know it, that editor will be your best friend (૭ ｡•̀ ᵕ •́｡ )૭
The official Krita channel also has some videos explaining for making them too! (6:05 is when brush editor overview starts btw)
Finally, here’s a link to my own experimental inks (beta). I’ve used the settings to recreate things like:
- splodgyness,
- randomness (like accidental small spatters)
- hard/soft edges depending on pressure,
- size reduction when moving fast
- and other stuff
Try using them as a template with your own brushtips and see if it’s any use for your goals 
✨ Extra rambling about the experimental inks
They were made in an attempt to re-create the beautiful “dye bleed” effect you see when you mix ink and water together, and paint with it. Due to this, they use a brushtip type called a “colour mask” - that’s why no matter what colour you pick, it’s always black.
They haven’t been “officially” released because I still have documentation/pretty icons to do (which takes time), but I made/used them for a commission so they are pretty solid as-is!