If you go in to the propmakers google drive (linked from https://propmakers-club.makespace.org/drive
), you’ll find the google site that is driving the website there. As a member of the group you should have permission to edit, and it is pretty easy easy to add pages etc like a nice version of a wiki.
Obviously also the google drive can store docs/spreadsheets too.
Tell me if you have problems, but should work great!