Hi! Currently not, other than brief description in the manual.
You can reference the existing pigments and brushes and experiment :)
Would probably still be interesting to create a place like a forum or discord server where you could share settings and guides/explanations how to use and adapt the node system for your own style or specific effects maybe even with example images, because if you aren't well versed in nodes it looks really intimidating... I know there are probably not that many people that use/know of this program even thou it surprised me how polished it already seemed when I first tried it.
You did a great job and I'm looking forward to any future plans or updates for this program that will come out someday.
Hi hi! Thank you for the suggestion! I do have a very brief node manual if you click the top right of the node panel. But yeah I need to have a more elaborate tutorial… And you can join my discord for Q&A stuff: https://discord.com/invite/Qew6URSEvK
Thank you so much for the interest too :D