Seriously, that's the side of things where Org is meant to get out of your way, not provide you with a bunch of flashy tools. Learning to create and manipulate headings (move up, move down, indent, outdent) should take you all of fifteen minutes. Add plain lists, if you like, and footnotes. That's about it.
Where things do get complicated is when you start exporting documents, and realize it would look a bit better if this bit were just a bit different, and then... rabbit hole. But all that stuff, while fiddly, is pretty straightforward, it doesn't have the emergent complexity of agenda handling.