Download the latest (2.2.1) Openoffice. Install it. User Guide is available at http://documentation.openoffice.org/manuals/OOo2.x/user_guide2_draft.pdf.
I am using OO in office and home :)
Just came to know that Supreme Court of India uses GNU/Linux and OO. Read http://en.wikipedia.org/wiki/OpenOffice.org#Market_share -Santhosh