I've got style, tearing through the code ... Here's a review of LibreOffice 6.0 styles management, including overview of functionality, categories, options, styles modification and export, some annoyances, and more. Enjoy.

Fire up LibreOffice. You can find the Styles menu in many ways. F11 as a shortcut - identical to Microsoft Office. Application menu. The new ribbon-like menu that you can enable in the 5.X branch onwards. Sidebar. Either way, once you open it, you will have a list of existing, default styles at your disposal, and you can start working.