If you have ever used a Gnome based Linux operating system such as Ubuntu, then you must have used Libre Office. It is used as the default office application for many Linux distributions and even if it does not come by default, it is one of the first options for Linux users. Libre Office is quite similar in functionality to Open Office (in fact, it is the community clone of OpenOffice) and offers many clones of MS Office applications.
Very deliberate instruction by TheFrugalComputerGuy in use of Open Office / LibreOffice to create a database. This is the first in the series. My advice (hard won) is to follow the lessons exactly without trying to rename fields or change too much of Anything, until it "clicks" and you are ready to build your very own.