What in game information do you think is easily missed or needs adding?
This can be:
Shortcuts to in game features - 'G for Guide' or 'F to open the Forge'
UI shortcuts - 'Ctrl to compare' or 'Ctrl+Alt to show more info'
Gameplay - What mechanics are not explained well enough in your opinion?
Visibility - What information is there, but not explained? Like your current Chapter in the Main menu.
Or anything else you can think of that would have been super useful to know or have made clearer to you in your first journey through Eterra!