In addition to this documentation, you may check a variety of other resources:

• the Ardour release notes
• the Ardour Forums
• information about Ardour Support via mailing lists and IRC (chat)

The IRC channels in particular are where most of the day-to-day development and debugging is done, and there are plenty of experienced users to help you if you run into problems.
Please be prepared to hang around for a few hours, the chat is usually busiest from 19:00 UTC to 04:00 UTC. If you can, keep your chat window open, so that you don't miss a belated answer.