This post covers just the very basics like how to enter tables, how to import them from a non-table region in your file, and how to export them to various formats. Once you've got these basics down, all the other power of tables is open to you. Maughan hints at these and promises to cover them in subsequent posts.
Again, if you're new to Org mode, Maughan's simple tutorial is a good way to learn the basics. Afterwards, you can branch off in whatever directions meet the needs of your workflow. I can't overemphasize how useful and powerful Org mode is and spending a little time learning about it will repay you manyfold.