So... YouTube started recommending videos about making paper and ink from grass and leaves...

In case you need to save a civilization, here are the tips:

1. use grass to make paper instead of leaves, unless you don't really have an option.
2. Leaves can be a good material to make ink
3. With old technics, you often need large amount of things to work. Small batches may fail.

----
Making Paper From Grass... and Printing On It
by Cory Morrison
https://www.youtube.com/watch?v=FOb34_s-K1M
----
Making Ink From Leaves... DIY Leaf Ink!
by Cory Morrison
https://www.youtube.com/watch?v=MRtVvK4Qp2I
-----
Can Leaves Be Turned Into Paper? DIY Experimental Leaf Paper
by Cory Morrison
https://www.youtube.com/watch?v=V10GaezQWhs