The “Tip of the day” took me to this page but I can’t find a link to the User Guide there: Feedback | LibreOffice - Free Office Suite - Based on OpenOffice - Compatible with Microsoft
Please keep question title short.
Hello,
On the page of the link you provided, you could select the menu item Get Help -> Documentation. That takes you to → English documentation. There you can select the wanted item(s).
That link is also on the main page of this site in the right hand column under Resources as Books, guides and more and there also is On-line Help