I tried finding videos or a wiki but could not find anything. How do I create a spellbook and that stuff? I have a scribing desk and a grand stone tablet. But nothing I try is working.

Hey, this will help
https://github.com/WinDanesz/AncientSpellcraft/wiki/Scribing-Desk

The wiki there is WIP, next upate you'll also find an ingame guidebook