Mentor available for LibreOffice quality assurance / bug testing

There are lots of different areas and tasks for all skill levels.

The most common thing we do is confirm bug reports.
The process of confirming a bug can be as simple as replying to the report that you could or couldn’t reproduce the issue with such and such a version and operating system.
There is, of course, an ideal procedure that involves improving the report in every way: https://wiki.documentfoundation.org/QA/BugTriage

Perhaps the easiest task is retesting old reports that have already been confirmed and analyzed. Last time I did it, I closed 50 reports in a single week!

Testing in anticipation of a release is explained here:
https://wiki.documentfoundation.org/QA/Testing/Regression_Tests

Bibisecting of known regressions is a powerful tool that can boost bug fixing tremendously: https://wiki.documentfoundation.org/QA/HowToBibisect

Miscellaneous cleanup tasks are listed here: https://wiki.documentfoundation.org/QA/Bugzilla/Gardening

For communication we have IRC and a mailing list:
https://webchat.freenode.net/?channels=#libreoffice-qa
http://lists.freedesktop.org/mailman/listinfo/libreoffice-qa

As mentioned in the subject, I can personally mentor you and the IRC channel usually has people, who can answer questions.
On IRC my nick is beluga_