LibreOffice was installed on my Mac (OS 10.5.9) a couple days ago. AM In the process of converting text, spread sheet & database files into libre, encountering numerous problems, mainly in format and simple or macro functions. I am only moderately literate in computer lingo. A detailed user guide would be of great help.
You can download documentations here. There are not new newest versions but will do the trick. You also have the build in Help function or if it is not installed clicking on help redirects you to the Web.