Without Flora, Mass Literacy is Irrelevant

Flora is fundamentally necessary for nearly every technology known to man. No flora means no wood or fossil fuels for fires. Without fire, you can not have metallurgy, ceramics, or mortar. Even many of our products we can make from animal parts need fire to process them, like hide glue and leather. Flora are also used directly provide what you need for most other basic materials includingto make things like textiles, basket weavingwicker, tool handles, etc.

In short, without fauna, your planet will be stuck in the early stone age LONG before there is enough information worth sharing to need to worry about how you will write it all down.