Getting Help With MariaDB
There's an active help community on DBA StackExchange.
If you have a question about a feature that is not properly documented or something that is not working as expected, go to the corresponding Knowledge Base page and ask your question there.
You can report and check on bugs which are unique to MariaDB in JIRA.
In some cases the documentation for MySQL can be used. Note that the MySQL documentation will not mention new features added in MariaDB, or other changes since introduced in MariaDB. See MariaDB versus MySQL and in greater detail under the MariaDB category.